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US 2004/0203401 A1Published application
Adaptive receiver architecture
AssigneeIntel Corporation
InventorsQinghua Li, Leslie A. Rusch
Life of this patent
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Abstract
The present disclosure relates to an apparatus and technique for a wireless communications receiver architecture and, more particularly, to an apparatus and technique for an analog adaptive receiver architecture.
Claims36
1:
- An apparatus comprising:
- a front end utilizing an adaptive filter to suppress, at least in part, interference in a received Ultra-Wide Band (UWB) signal and produce at least one symbol signal;
- and
- a phase shift key (PSK) symbol detector to extract information from the symbol signal.
1 more element
2:
- The apparatus of claim 1, further comprising:
- an amplification unit to facilitate the isolation and amplification of an Ultra-Wide Band (UWB) signal and produce the received UWB signal.
3:
- The apparatus of claim 2, the amplification unit comprising:
- a band pass filter to facilitate the isolation of the Ultra-Wide Band (UWB) signal;
- and
- a low noise amplifier to amplify the isolated signal.
1 more element
4:
- The apparatus of claim 3, wherein the front end utilizes, at least in part, a Least-Means Squared filter.
5:
- The apparatus of claim 1, the front end comprising an analog circuit to suppress, at least in part, interference in a received Ultra-Wide Band (UWB) signal and produce at least one symbol signal.
6:
- The apparatus of claim 1, the front end comprising:
- a number of branches, each including:
- a delay component to delay a feedback signal;
- a multiplier to multiply the input signal with the feedback signal;
- and
- an integrator to produce a symbol signal utilizing, at least in part, the output of the multiplier.
3 more elements
7:
- The apparatus of claim 6, the number of branches comprising:
- one branch for each observed symbol within an observation window;
- and
- wherein the observation window includes at least one observed symbol.
1 more element
8:
- The apparatus of claim 6, the front end further including:
- a feedback signal generator to generate the feedback signal utilizing a feedback path and a variable gain amplifier.
9:
- The apparatus of claim 6, the front end further including:
- a feedback signal generator to generate the feedback signal utilizing a feedback path and a multiplier.
10:
- The apparatus of claim 8, the feedback path comprising:
- an adder to compare the symbol signal of a first branch to the information output of the Phase-Shift Key symbol detector.
11:
- The apparatus of claim 1, the front end comprising:
- a digital adaptive filter to generate the symbol signal
- at least two analog-to-digital converters to provide digital signals to the digital adaptive filter;
- at least two integrator units to facilitate the reduction in the sampling rate of the analog-to-digital converter;
- and
- at least two frequency down converter units to facilitate the division of the received Ultra-Wide Band (UWB) signal into two signals each having half the bandwidth of the received UWB signal.
3 more elements
12:
- The apparatus of claim 11, wherein the received Ultra-Wide Band (UWB) signal is a carrierless signal.
13:
- The apparatus of claim 1, the front end comprising:
- a plurality of RAKE filters to split the received Ultra-Wide Band (UWB) signal into a plurality of signals;
- and
- an adaptive filter to at least in part suppress interference in the received UWB signal and produce at least one symbol signal.
1 more element
14:
- The apparatus of claim 13, the an adaptive filter comprising:
- a plurality of analog-to-digital converters to sample the plurality of signals at a time corresponding to a path associated with each of the plurality of signals;
- and
- a digital adaptive filter.
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15:
- The apparatus of claim 13, wherein the adaptive filter is capable of determining a channel gain for each of the plurality of signals.
16:
- A system comprising:
- an antenna to facilitate the reception and transmission of an Ultra-Wide Band (UWB) signal;
- a PSK symbol transmitter to generate a UWB signal for transmission by the antenna;
- and
- a UWB signal receiver including:
- an amplification unit to facilitate the isolation and amplification of an Ultra-Wide Band (UWB) signal and produce a received UWB signal;
- a front end utilizing an adaptive filter to suppress, at least in part, interference in the received UWB signal and produce at least one symbol signal;
- and
- a phase shift key (PSK) symbol detector to extract information from the symbol signal.
6 more elements
17:
- The system of claim 16, the signal receiver further comprising:
- an amplification unit to facilitate the isolation and amplification of an Ultra-Wide Band (UWB) signal and produce a received UWB signal.
18:
- The system of claim 17, the amplification unit comprising:
- a band pass filter to facilitate the isolation of the Ultra-Wide Band (UWB) signal;
- and
- a low noise amplifier to amplify the isolated signal.
1 more element
19:
- The system of claim 18, wherein the analog adaptive front end utilizes, at least in part, a Least-Means Squared filter.
20:
- The system of claim 16, the front end comprising:
- a number of branches, each branch including:
- a delay component to delay a feedback signal;
- a multiplier to multiply the input signal with the feedback signal;
- and
- an integrator to produce a symbol signal utilizing, at least in part, the output of the multiplier.
3 more elements
21:
- The system of claim 16, the number of branches comprising:
- one branch for each observed symbol within an observation window;
- and
- wherein the observation window includes at least one observed symbol.
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22:
- The system of claim 20, the front end further including:
- a feedback signal generator to generate the feedback signal utilizing a feedback path and a variable gain amplifier.
23:
- The system of claim 20, the front end further including:
- a feedback signal generator to generate the feedback signal utilizing a feedback path and a multiplier.
24:
- The system of claim 23, the feedback path comprising:
- an adder to compare the symbol signal of a first branch to the symbol of the output of the phase-shift key symbol detector.
25:
- The system of claim 16, the front end including:
- a digital adaptive filter to generate the symbol signal
- at least two analog-to-digital converters to provide digital signals to the digital adaptive filter;
- at least two integrator units to facilitate the reduction in the sampling rate of the analog-to-digital converter;
- and
- at least two frequency down converter units to facilitate the division of the received Ultra-Wide Band (UWB) signal into two signals each having half the bandwidth of the received UWB signal.
3 more elements
26:
- The system of claim 25, wherein the received Ultra-Wide Band (UWB) signal is a carrierless signal.
27:
- The system of claim 16, the front end including:
- a plurality of RAKE filters to split the received Ultra-Wide Band (UWB) signal into a plurality of signals;
- and
- an adaptive filter to at least in part suppress interference in the received UWB signal and produce at least one symbol signal.
1 more element
28:
- A method comprising:
- receiving an Ultra-Wide Band (UWB) signal;
- isolating the UWB signal to produce an isolated signal;
- amplify the isolated signal to produce a received signal;
- adaptively filtering the received signal utilizing analog circuitry to produce a phase shift key (PSK) symbol signal;
- and
- extracting information from the PSK symbol signal.
4 more elements
29:
- The method of claim 28 wherein:
- isolating the Ultra-Wide Band (UWB) signal includes band pass filtering the UWB signal;
- and
- amplify the isolated signal includes utilizing a low noise amplifier.
1 more element
30:
- The method of claim 29, wherein adaptively filtering the received signal utilizing analog circuitry includes utilizing, at least in part, a Least-Means Squared filtration technique.
31:
- The method of claim 28, wherein adaptively filtering the received signal utilizing analog circuitry includes passing the received signal through a number of branches, wherein the number of branches is equal to a number of observed symbols within an observation window.
32:
- The method of claim 31, wherein passing the received signal through a branch includes:
- delaying a feedback signal to produce a delayed signal;
- multiplying the received signal with the delayed signal;
- and
- integrating the multiplied signal to produce the symbol signal.
2 more elements
33:
- The method of claim 31, wherein adaptively filtering the received signal utilizing analog circuitry includes producing a feedback signal by:
- comparing the symbol signal generated by a first branch with the information extracted from the symbol signal;
- and
- amplifying the compared signal.
1 more element
34:
- The method of claim 28, wherein adaptively filtering the received signal utilizing analog circuitry includes:
- down converting the received signal to produce two down converted signals having substantially half the bandwidth of the received signal;
- integrating the two down converted signals to produce two signals with a lower sampling frequency:
- converting the two signals from analog to digital;
- and
- filtering the two signals utilizing a digital adaptive filter.
3 more elements
35:
- The method of claim 34, wherein the received signal is a carrierless signal.
36:
- The method of claim 28, wherein adaptively filtering the received signal utilizing analog circuitry includes:
- splitting the received signal into a plurality of RAKE filtered signals;
- and
- adaptively filtering the split signals to, at least in part, suppress interference in the received signal.
1 more element