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US 8,412,116 B1Granted
Wireless transceiver
AssigneeQUALCOMM Incorporated
InventorsBeomsup Kim, Cormac S. Conroy
Life of this patent
Estimating the term…
Abstract
A system and method are disclosed for transmitting and receiving signals. The method includes receiving a received signal; demodulating the received signal by mixing the received signal with a receiver local oscillator signal generated by a voltage controlled oscillator configured to generate the receiver local oscillator signal; switching the configuration of the voltage controlled oscillator to generate a transmission signal for use by a transmitter; and transmitting a modulated signal derived from the transmission signal.
Claims17
A method for transmitting and receiving signals in a communication system comprising:
- receiving a received signal, wherein the received signal is split into an in phase (I) component and a quadrature (Q) component;
- configuring a local oscillator to generate a receiver local oscillator signal, the local oscillator including a phase locked loop (PLL) having a divide ratio controlled by a divider and a voltage controlled oscillator having an output that changes in response to changes in the divide ratio, said configuring further comprising controlling the divider to generate a receive divide ratio in response to channel information pertaining to the received signal;
- demodulating the I and Q components of the received signal by mixing each of the components of the received signal with the receiver local oscillator signal;
- sampling the demodulated I and Q components simultaneously;
- delaying one of the Q component and the I component from the other by a time delay and interleaving, according to the time delay, the sampled demodulated I and Q components into a received data sequence;
- switching the configuration of the local oscillator to generate a transmission signal for use by a transmitter, wherein switching comprises switching at least one port of the local oscillator from a receive path to a directly modulated transmit path including switching an input port of the divider from a receive path including the channel information pertaining to the received signal to a transmit path including a digitized transmit input signal;
- generating a directly modulated transmission signal at the output of the voltage controlled oscillator by changing the divide ratio of the PLL in response to the digitized transmit input signal;
- and
- transmitting the directly modulated transmission signal.
6 more elements
A transceiver comprising:
- a receiver configured to demodulate a received signal by using a receiver local oscillator signal, wherein the received signal is split into an in phase (I) component and a quadrature (Q) component;
- a transmitter configured to transmit a directly modulated transmission signal;
- and
- a local oscillator configured to generate the receiver local oscillator signal and the directly modulated transmission signal, the local oscillator including:
- a phase locked loop (PLL) having a divide ratio controlled by a divider,
- a voltage controlled oscillator having an output that changes in response to changes in the divide ratio, wherein, in a receive mode, the divider is operative to generate a receive divide ratio in response to channel information pertaining to the received signal and, in a transmit mode, to change the divide ratio in response to a digitized transmit input signal such that the voltage controlled oscillator outputs a directly modulated transmission signal;
- a network of switches configured to selectively connect the receiver to the local oscillator in the receive mode and to connect the transmitter to the local oscillator in the transmit mode, wherein at least one switch of the network of switches is for toggling a port of the local oscillator between a receive path and a directly modulated transmit path and at least one other switch of the network of switches is for toggling an input port of the divider between the receive path including the channel information pertaining to the received signal and the transmit path including the digitized transmit input signal;
- one or more mixers configured demodulate the I and Q components of the received signal;
- one or more samplers configured to sample the demodulated I and Q components simultaneously;
- and
- a delayer configured to delay one of the Q component and the I component from the other by a time delay and to interleave according to the time delay the sampled demodulated I and Q components into a received data sequence.
8 more elements
A transceiver comprising:
- means for receiving a received signal, wherein the received signal is split into an in phase (I) component and a quadrature (Q) component;
- means for configuring a local oscillator to generate a receiver local oscillator signal, the local oscillator including a phase locked loop (PLL) having a divide ratio controlled by a divider and a voltage controlled oscillator having an output that changes in response to changes in the divide ratio, said configuring further comprising controlling the divider to generate a receive divide ratio in response to channel information pertaining to the received signal;
- means for demodulating the I and Q components of the received signal by mixing each of the components of the received signal with the receiver local oscillator signal;
- means for sampling the demodulated I and Q components simultaneously;
- means for delaying one of the Q component and the I component from the other by a time delay and interleaving, according to the time delay, the sampled demodulated I and Q components into a received data sequence;
- means for switching the configuration of the local oscillator to generate a transmission signal for use by a transmitter, wherein switching comprises switching at least one port of the local oscillator from a receive path to a directly modulated transmit path including switching an input port of the divider from a receive path including the channel information pertaining to the received signal to a transmit path including a digitized transmit input signal;
- means for generating a directly modulated transmission signal at the output of the voltage controlled oscillator by changing the divide ratio of the PLL in response to the digitized transmit input signal;
- and
- means for transmitting the directly modulated transmission signal.
6 more elements
Dependencies are inferred from the claim text.