Receiver and its decoding method

Abstract

The invention relates to a receiver and decoding method, wherein said decode method comprises that: filtering out the high-frequency component of received signal, to obtain one burst to be buffered; judging the sequence of burst in data block; checking the front X bursts of four bursts of data block, to obtain the modulation method of front X bursts, while X is not lower than 2 but lower than 4; based on the modulation method of front X burst modulations, predicting the modulation methods of left 4-x bursts; based on the modulations of four bursts, finding the modulation method of data block. The invention can reduce information memory amount, save memory space, reduce the complexity of modulation correcting module, etc.

Description

technical field [0001] The invention relates to a wireless information processing technology, in particular to a receiver and a decoding method thereof. Background technique [0002] In some cellular communication systems, different modulation methods can be advantageously used, such as: 8-PSK (Phase Shifi Keying, phase shift keying) and GMSK (Gaussian Minimum Shift Keying, Gaussian Minimum Shift Keying), in the transmission Exchange information between a machine (such as a base station) and a receiver (such as a mobile station or a fixed cellular terminal), for example: Enhanced Data rates for GSM (Global System for Mobile communication, Global System for Mobile Communications) evolution (Enhanced Data rates for GSMEvolution , EDGE) system, which supports two modulation modes of linear 8-PSK and GMSK. In the packet data transmission mode of EDGE, 8-PSK can use 5 different coding rates for coding, while GMSK can use 4 different coding rates. to encode. These different enco...

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Problems solved by technology

[0006] 1. To detect the modulation modes of the four bursts in each block requires a large amount of calculation and high detection complexity, thus reducing the performance of the receiver and increasing the delay of information processing; and , each time it is necessary to detect the modulation modes of the last two bursts in a block, and the modulation modes of the last two bursts may be detected incorrectly, which increases the probability of detection errors of the last two bursts, and the modulation correction When the module processes the burst, it will clear the soft value of one or two bursts different from the determined modulation mode, which will reduce the probability of correct decoding;

[0007] 2. In addition, the modulation mode information of four bursts needs to be stored in the modulation mode detection module each time, so as to determine the modulation mode of the block through the statistics and analysis of the modulation modes of each burst, which requires a certain The amount of calculation will prolong the time for the receiver to process data information, which will also reduce the performance of the receiver and increase the delay of information processing. Moreover, storing the modulation mode information in the modulation mode detection module will occupy a certain storage space , which will increase the complexity of the modulation detection module

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