Back to results
US 6,856,644 B1Granted
Method and apparatus for forward link power control bit generation in a spread-spectrum communication system
AssigneeMotorola, Inc.
InventorsMichael M. Wang, Louay A. Jalloul, Tyler Brown
Life of this patent
Estimating the term…
Abstract
Power control bit generation for forward link power control in a spread spectrum communication system is accomplished through modification of a set point threshold. Modification of the set point reduces the number of squaring and division mathematical operations, thus more efficiently utilizing limited system resources in a mobile receiver used in forward link power control.
Claims18
An apparatus for generating power control bits in a communication system comprising:
- a receiver configured to receive at least one transmitted signal, the receiver comprised of one or more finger receivers each configured to receive a corresponding multipath component of the at least one transmitted signal and resolve the multipath components into corresponding pilot and data channels;
- one or more pilot channel processors corresponding to each of the one or more finger receivers, each of the one or more pilot channel processors receiving a respective pilot channel from a corresponding finger receiver of the one or more finger receivers and outputting a first value based on at least one characteristic of the received pilot channel
- a set point value modifying circuit configured to modify a set point value based on the first value and output a modified set point value, wherein the set point modifying circuit comprises a processing portion configured to generate a set point correction factor based on the first value and a multiplier configured to multiply the set point value with the set point correction factor;
- an estimating circuit for calculating an estimated signal to interference plus noise ratio of the at least one transmitted signal;
- and
- a power control bit generator configured to output a power control bit having a state that is determined by the power control bit generator using a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
3 more elements
An apparatus for generating power control bits in a communication system comprising:
- a receiver configured to receive at least one transmitted signal, the receiver comprised of one or more finger receivers each configured to receive a corresponding multipath component of the at least one transmitted signal and resolve the multipath components into corresponding pilot and data channels;
- one or more pilot channel processors corresponding to each of the one or more finger receivers, each of the one or more pilot channel processors receiving a respective pilot channel from a corresponding finger receiver of the one or more finger receivers and outputting a first value based on at least one characteristic of the received pilot channel;
- a set point value modifying circuit configured to modify a set point value based on the first value and output a modified set point value;
- an estimating circuit for calculating an estimated signal to interference plus noise ratio of the at least one transmitted signal;
- and
- a power control bit generator configured to output a power control bit having a state that is determined by the power control bit generator using a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio, wherein the power control bit generator includes a comparator and the predetermined analysis comprises:
- comparing the modified set point to the signal to interference plus noise ratio with the comparator;
- and
- outputting from the comparator the at least one state having a binary value of one when the signal to interference plus noise ratio is greater than the modified set point;
- and
- outputting from the comparator the at least one state having a binary value of zero when the signal to interference plus noise ratio is one of less than and equal to the modified set point.
8 more elements
An apparatus for generating power control bits in a communication system comprising:
- a receiver configured to receive at least one transmitted signal, the receiver comprised of one or more finger receivers each configured to receive a corresponding multipath component of the at least one transmitted signal and resolve the multipath components into corresponding pilot and data channels;
- one or more pilot channel processors corresponding to each of the one or more finger receivers, each of the one or more pilot channel processors receiving a respective pilot channel from a corresponding finger receiver of the one or more finger receivers and outputting a first value based on at least one characteristic of the received pilot channel, the one or more pilot channel processors each including a channel estimator for estimating a power of the pilot channel and a conjugate calculator for calculating the conjugate of the estimated power of the pilot channel;
- a set point value modifying circuit configured to modify a set point value based on the first value and output a modified set point value;
- an estimating circuit for calculating an estimated signal to interference plus noise ratio of the at least one transmitted signal;
- and
- a power control bit generator configured to output a power control bit having a state that is determined by the power control bit generator using a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
3 more elements
An apparatus for generating power control bits in a communication system comprising:
- a receiver configured to receive at least one transmitted signal, the receiver comprised of one or more finger receivers each configured to receive a corresponding multipath component of the at least one transmitted signal and resolve the multipath components into corresponding pilot and data channels;
- one or more pilot channel processors corresponding to each of the one or more finger receivers, each of the one or more pilot channel processors receiving a respective pilot channel from a corresponding finger receiver of the one or more finger receivers and outputting a first value based on at least one characteristic of the received pilot channel;
- a set point value modifying circuit configured to modify a set point value based on the first value and output a modified set point value;
- an estimating circuit for calculating an estimated signal to interference plus noise ratio of the at least one transmitted signal, wherein the estimating circuit estimates the SINR based on one or more received second values related to noise variance of the one or more multipath channels and wherein the one or more received second values are the inverse of each respective value of a finger's noise variance;
- and
- a power control bit generator configured to output a power control bit having a state that is determined by the power control bit generator using a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
3 more elements
An apparatus for generating power control bits in a communication system comprising:
- a receiver configured to receive at least one transmitted signal, the receiver comprised of one or more finger receivers each configured to receive a corresponding multipath component of the at least one transmitted signal and resolve the multipath components into corresponding pilot and data channels;
- one or more pilot channel processors corresponding to each of the one or more finger receivers, each of the one or more pilot channel processors receiving a respective pilot channel from a corresponding finger receiver of the one or more finger receivers and outputting a first value based on at least one characteristic of the received pilot channel;
- a set point value modifying circuit configured to modify a set point value based on the first value and output a modified set point value;
- an estimating circuit for calculating an estimated signal to interference plus noise ratio of the at least one transmitted signal, wherein the estimating circuit estimates the SINR based on one or more received second values related to noise variance of the one or more multipath channels and wherein the one or more received second values is the product of all fingers' noise variance excluding a noise variance of the particular finger;
- and
- a power control bit generator configured to output a power control bit having a state that is determined by the power control bit generator using a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
3 more elements
An apparatus for generating power control bits in a communication system comprising:
- a receiver configured to receive at least one transmitted signal, the receiver comprised of one or more finger receivers each configured to receive a corresponding multipath component of the at least one transmitted signal and resolve the multipath components into corresponding pilot and data channels;
- one or more pilot channel processors corresponding to each of the one or more finger receivers, each of the one or more pilot channel processors receiving a respective pilot channel from a corresponding finger receiver of the one or more finger receivers and outputting a first value based on at least one characteristic of the received pilot channel;
- a set point value modifying circuit configured to modify a set point value based on the first value and output a modified set point value;
- an estimating circuit for calculating an estimated signal to interference plus noise ratio of the at least one transmitted signal, wherein the estimating circuit includes multiple processing paths corresponding to each multipath channel that each calculate a respective soft-coded bit value for each multipath channel and a summing junction that sums all of the soft-coded bit values;
- and
- a power control bit generator configured to output a power control bit having a state that is determined by the power control bit generator using a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
3 more elements
A method for generating power control bits in a communication system comprising the steps of:
- receiving at least one transmitted signal having one or more multipath components;
- resolving each of one or more multipath components into corresponding pilot and data channels;
- processing each of the pilot channels and outputting a first value based on at least one characteristic an estimated SINR of the respective received pilot channel determined by the processing;
- modifying a set point value based on the first value and outputting a modified set point value;
- calculating an estimated signal to interference plus noise ratio (SINR) of the at least one transmitted signal;
- and setting a power control bit having at least one state according to a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
3 more elements
A method for generating power control bits in a communication system comprising the steps of:
- receiving at least one transmitted signal having one or more multipath components;
- resolving each of one or more multipath components into corresponding pilot and data channels;
- processing each of the pilot channels and outputting a first value based on at least one characteristic of the respective received pilot channel determined by the processing;
- modifying a set point value based on the first value and outputting a modified set point value;
- calculating an estimated signal to interference plus noise ratio (SINR) of the at least one transmitted signal;
- and
- setting a power control bit having at least one state according to a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio, wherein setting the power control bit comprises:
- comparing the modified set point to the SINR of the transmitted signal;
- setting the at least one state to a binary value of one when the modified set point is less than the signal to interference plus noise ratio;
- and
- setting the at least one state to a binary value of zero when the modified set point is greater or equal to the signal to interference plus noise ratio.
8 more elements
A method for generating power control bits in a communication system comprising the steps of:
- receiving at least one transmitted signal having one or more multipath components;
- resolving each of one or more multipath components into corresponding pilot and data channels;
- processing each of the pilot channels and outputting a first value based on at least one characteristic of the respective received pilot channel determined by the processing, wherein the step of processing each of the pilot channels comprises estimating a power of the pilot channel and calculating a conjugate of the estimated power of the pilot channel;
- modifying a set point value based on the first value and outputting a modified set point value;
- calculating an estimated signal to interference plus noise ratio (SINR) of the at least one transmitted signal;
- and
- setting a power control bit having at least one state according to a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
4 more elements
A method for generating power control bits in a communication system comprising the steps of:
- receiving at least one transmitted signal having one or more multipath components;
- resolving each of one or more multipath components into corresponding pilot and data channels;
- processing each of the pilot channels and outputting a first value based on at least one characteristic of the respective received pilot channel determined by the processing;
- modifying a set point value based on the first value and outputting a modified set point value;
- calculating an estimated signal to interference plus noise ratio (SINR) of the at least one transmitted signal, wherein the SINR of the transmitted signal is estimated based on one or more received second values related to noise variance of the one or more multipath channels and wherein the one or more received second values are the inverse of each respective value of noise variance of the one or more multipath channels;
- and
- setting a power control bit having at least one state according to a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
4 more elements
A method for generating power control bits in a communication system comprising the steps of:
- receiving at least one transmitted signal having one or more multipath components;
- resolving each of one or more multipath components into corresponding pilot and data channels;
- processing each of the pilot channels and outputting a first value based on at least one characteristic of the respective received pilot channel determined by the processing;
- modifying a set point value based on the first value and outputting a modified set point value;
- calculating an estimated signal to interference plus noise ratio (SINR) of the at least one transmitted signal, wherein the SINR of the transmitted signal is estimated based on one or more received second values related to noise variance of the one or more multipath channels and wherein the one or more received second values is the product of noise variances of the one or more multipath channels excluding a noise variance of a particular multipath channel;
- and
- setting a power control bit having at least one state according to a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
4 more elements
A method for generating power control bits in a communication system comprising the steps of:
- receiving at least one transmitted signal having one or more multipath components;
- resolving each of one or more multipath components into corresponding pilot and data channels;
- processing each of the pilot channels and outputting a first value based on at least one characteristic of the respective received pilot channel determined by the processing;
- modifying a set point value based on the first value and outputting a modified set point value;
- calculating an estimated signal to interference plus noise ratio (SINR) of the at least one transmitted signal, wherein calculating the estimated SINR of the transmitted signal comprises calculating a soft-coded bit value for each multipath channel and summing all of the calculated soft-coded bit values;
- and
- setting a power control bit having at least one state according to a predetermined analysis based on the modified set point value and the estimated signal to interference plus noise ratio.
4 more elements
Dependencies are inferred from the claim text.