Differential receiving system of cellular receiver and method for realizing signal reception
A differential signal and differential reception technology, applied in the baseband system, transmission system, digital transmission system, etc., can solve problems such as no room for debugging, high requirements for differential line layout, and inability to guarantee the receiving sensitivity of the differential receiving system, so as to improve reception Influence of sensitivity, improvement of receiving sensitivity, effect of reducing layout requirements
Active Publication Date: 2013-07-03
罗源县产品质量检验所
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[0011] To sum up, in the prior art, the absolute value of the phase difference of the differential signal input from the differential line to the rear-end receiving equipment is completely determined by the balun and the differential line, and there is no room for debugging, not only for the layout of the differential line The requirements are high, and the receiving sensitivity of the differential receiving system cannot be guaranteed
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[0034] figure 2 It is a schematic diagram of the composition structure of the differential receiver in the cellular receiver of the present invention, as figure 2 As shown, it includes an antenna 200 , a filter 202 , a signal transmission line 204 , a balun 206 , a differential line + 208 , a differential line - 210 , and a signal amplification, phase detection and demodulation module 250 . Among them, the signal amplification, phase detection and demodulation module 250 includes a low noise amplifier 252, a differential line + 254, a differential line - 256, a phase detection unit 258, a digital phase control unit 262, a signal demodulation device 266, a signal transmission line 260, a signal Transmission line 264.
[0035] figure 2 Among them, the components before the low noise amplifier 252 are completely consistent with the prior art. The signal transmitted by wireless is first received by the antenna 200, and then enters the filter 202 for filtering. After filterin...
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This disclosure provides a differential reception system in a cellular receiver and a method for realizing signal reception thereof, including: filtering a received signal and then transforming the filtered signal into differential signals; and performing amplification and phase discrimination process of differential signals and compensating the phase of either channel differential signal, and synthesizing the processed differential signals and demodulating the synthesized signal. By means of controlling the phases of differential lines, the disclosure improves the receiving sensitivity of a differential reception system and significantly reduces the requirement for layout of the differential lines.
Description
technical field [0001] The invention relates to a differential receiving system, in particular to a differential receiving system of a cellular receiver and a method for realizing signal reception thereof. Background technique [0002] Cellular receivers in the form of differential reception systems are common. A differential receiving system usually includes antennas, filters, baluns, differential lines and back-end receiving equipment. Among them, the antenna is used to receive radio frequency signals transmitted through space; the filter is used to filter out interference outside the communication frequency band; the balun is used to divide the signal received by the antenna into two channels, and the phase difference between one signal and the other signal The absolute value of is about 180 degrees, that is, the phases of the two signals are opposite. It is worth mentioning that the time delay difference between differential signals can be uniquely obtained from the ph...
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IPC IPC(8): H04L27/22H04L27/227
CPCH04L2027/0026H04L2027/0053H04L27/22H04L25/0274H04B1/18H04L2027/0067
Inventor 何文卿
Owner 罗源县产品质量检验所