Method and apparatus for processing signal

Abstract

The invention relates to a method for processing signal and relative device. Wherein, it is characterized in that: processing advanced detection on received baseband signal, to output detected effective multi-path information; based on said information, processing judgment, and according to the result of judgment, distributing the multi-path information that need demodulation; based on distributed multi-path information, selecting the signal of relative branch to be demodulated and decoded. The invention can directly process demodulation and filtration on received baseband signal, without storing long demodulate data to correct the signal deflection, to reduce the time delay of memory resource and data treatment. In addition, the invention processes information demodulation on the total branches with effective multi-path information, after the advanced detection, to avoid the decrease of demodulation property caused by mistake selection of demodulate branch, to confirm the access property of signal.

Description

technical field [0001] The present invention relates to the communication field, in particular to a method and device for processing signals. Background technique [0002] In a mobile communication system, due to the relative movement of the UE and the base station, the frequency of the received signal will expand, which is called the Doppler effect. In most high-speed scenarios, the signal propagation between the base station and the UE is a direct line-of-sight path, and the Doppler effect is directly reflected in the overall shift of the frequency of the received signal. When the base station is very close to the highway, the angle between the user's moving direction and the signal propagation direction will be small, and the signal reception will generate a large frequency deviation. [0003] The schematic diagram of frequency offset generation is as follows figure 1 As shown, when the distance between the base station and the road is very close, the angle between the ...

AI Technical Summary

Problems solved by technology

However, due to the short transmission time of the access signal, the preamble is only 4096chips, and the message is only 10ms or 20ms, so before correcting the frequency offset of the received signal, a certain length of demodulation data must be stored and wait for the output of the frequency offset estimation

[0014] 2. When filtering after frequency offset estimation of continuous symbols, longer demodulation data needs to be stored, which increases hardware storage resources and data processing delay

[0015] If you need to obtain more reliable frequency offset, you can estimate the frequency offset for consecutive symbols and then perform filtering. This requires storing longer demodulation data, but the base station has special requirements for signal processing delay, especially to detect the preamble in time And feed back the downlink AI indicator signal, so hardware storage resources and processing delay requirements limit the performance of frequency offset estimation

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