Patent ID: 9124414
Filing Date: 2015-09-01
Classification: H03J,H04L

Abstract:
1. A receiver, comprising: a crystal oscillator, a phase-locked loop, a radio frequency module, an analog baseband processing module, an adjusting module, and a digital baseband processing module, wherein: the crystal oscillator is configured to separately output a first clock signal as a reference clock to the phase-locked loop, the radio frequency module, and the analog baseband processing module; the phase-locked loop is configured to: adjust a frequency adjustment coefficient according to a rate deviation sent by the digital baseband processing module; perform frequency division or frequency multiplication processing on the first clock signal according to an adjusted frequency adjustment coefficient, to obtain a second clock signal; and send the second clock signal to the digital baseband processing module to serve as a reference clock of the digital baseband processing module; the radio frequency module is configured to receive a radio signal sent by a transmitter, and demodulate the radio signal to obtain an original analog baseband signal; the analog baseband processing module is configured to perform, based on a clock frequency of the first clock signal, analog-to-digital conversion on the original analog baseband signal, to obtain a first digital baseband signal; the digital baseband processing module is configured to: demodulate and decode the first digital baseband signal to obtain signal source information; detect the first digital baseband signal in a demodulation process to obtain a rate deviation between the first digital baseband signal and a preset reference signal; and send the rate deviation to the phase-locked loop, wherein the preset reference signal is a digital baseband signal obtained after the analog baseband processing module performs, based on a clock signal with no deviation, the analog-to-digital conversion processing on the original analog baseband signal; and the adjusting module is configured to adjust the first digital baseband signal, so that a rate of an adjusted first digital baseband signal is consistent with a rate of the preset reference signal, and send the adjusted first digital baseband signal to the digital baseband processing module; wherein the adjusting module comprises: a first first-in first-out memory, a first resampling module, a second first-in first-out memory and a second resampling module, wherein: the first first-in first-out memory is configured to buffer the first digital baseband signal output by the analog baseband processing module; the first resampling module is configured to resample the first digital baseband signal buffered by the first first-in first-out memory to obtain the adjusted first digital baseband signal, so that the rate of the adjusted first digital baseband signal is consistent with the rate of the preset reference signal, and send the adjusted first digital baseband signal to the digital baseband processing module; the second first-in first-out memory is configured to buffer a second digital baseband signal output by the digital baseband processing module wherein the second digital baseband signal is a digital baseband signal obtained after the digital baseband processing module codes and modulates the signal source information; the second resampling module is configured to resample the second digital baseband signal buffered by the second first-in first-out memory to obtain an adjusted second digital baseband signal, so that a rate of the adjusted second digital baseband signal is consistent with the rate of the first digital baseband signal, and send the adjusted second digital baseband signal to the analogy baseband processing module; the analog baseband processing module is further configured to perform digital-to-analog conversion on the adjusted second digital baseband signal to obtain a to-be-transmitted analog baseband signal, and send the to-be-transmitted analog baseband signal to the radio frequency module; and the radio frequency module is further configured to modulate the to-be-transmitted analog baseband signal to obtain a transmit signal, and transmit the transmit signal.