Equalized receiving method and system applicable to wireless channel
A technology of equalized reception and wireless channel, which is applied in the field of balanced reception system of wireless channel, can solve the problems of multipath environment and noise, affect the system equalization result, reduce the performance of equalized reception, etc., reduce channel distortion and noise, improve Equalization performance, effect of improving equalization demodulation performance
Active Publication Date: 2015-08-12
COMBA TELECOM SYST CHINA LTD
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Problems solved by technology
However, in an actual system, affected by the multipath environment and noise, the estimation of TA cannot be completely accurate, and it will always affect the equalization result of the system
[0004] To sum up, the prior art is easily affected by the multipath environment and noise in signal equalization demodulation, and the estimated time advance will be biased, which reduces the equalized reception performance
Therefore, the channel equalizer needs to solve the problems of low timing accuracy and deviation and effectively improve the equalization demodulation performance
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[0021] The present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.
[0022] Such as figure 1 , is a schematic flowchart of an equalized receiving method applicable to a wireless channel in an embodiment of the present invention, including the following steps:
[0023] S101. Determine the initial channel parameter estimate and timing advance of the multi-sampling signal;
[0024] For S101, in a preferred embodiment, the received multi-sampling signal may be de-rotated first, and the de-rotated signal is delayed and synchronized, and then the initial channel parameter estimate and timing advance are determined;
[0025] According to the GSM protocol, for regular bursts, GMSK using linear modulation is equivalent to baseband modulation similar to 8PSK, which needs to be symbol rotation;
[0026] During demodulation, it is necessary to perfor...
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The invention relates to a balance receiving method and a balance receiving system suitable for a wireless channel, and belongs to the technical field of mobile communication. The method comprises the following steps of: determining an initial channel parameter estimate value and timing advance of multiple sampling signals; extracting a synchronous sampling sequence and a biased sampling sequence of burst pulse according to the timing advance, and determining the final channel parameter estimate value; and calculating the physical measurements of the synchronous sampling sequence and the biased sampling sequence according to the final channel parameter estimate value, and feeding the synchronous sampling sequence or / and the biased sampling sequence preferably for balance demodulation according to the physical measurements. By the method, a simple and effective correction method is provided considering that the timing advance estimate value is likely to be biased in case of multi-path environment and noise interference, and the quality of a plurality of time bias sampling sequences is optimized, so that the balance demodulating performance is effectively improved, and the problems of low timing precision and bias are solved.
Description
technical field [0001] The invention relates to the technical field of mobile communication, in particular to a balanced receiving method suitable for wireless channels and a balanced receiving system suitable for wireless channels. Background technique [0002] The GSM communication system is the second generation mobile communication system, which has been widely used all over the world. However, with the development of mobile communication technology and the increase of users' demand for data services, the competitiveness of existing systems will be enhanced. The European Telecommunications Standards Institute (ETSI) decided to develop an enhanced data rate GSM evolution scheme—EDGE (Enhanced Data rates for GSM Evolution) as the future evolution direction of GSM, and introduced a multi-level digital modulation method—8PSK (8phase-shift keying, octal phase shift keying) modulation. In 2007, the latest enhanced version of the EDGE system (EDGE+ system) was promulgated, an...
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IPC IPC(8): H04L25/03H04L25/02
Inventor 付杰尉邓单
Owner COMBA TELECOM SYST CHINA LTD