Methods, equipment, decoder, receiver and system

Abstract

The invention provides a method, equipment, decoding method, receiver and system for detecting phase ambiguity. The method for detecting the phase ambiguity comprises the steps of using a plurality of candidate phase ambiguities to carry out phase precorrection on each received subframe to obtain a precorrection soft information sequence of each subframe; and determining a final phase ambiguity of a previous subframe with the number of v-1 before a present subframe according to a corrected soft information sequence of a previous subframe with a first quantity before the present subframe, a precorrection soft information sequence of a previous subframe with a second quantity, and a precorrection soft information sequence of the present subframe, wherein the v represents a phase ambiguity detection step length and is a positive integer larger than or equal to one. Therefore, influence of the phase ambiguity of each subframe can be detected, various phase ambiguities existing in the system can be detected, and the detection of the phase ambiguity can not just be limited to several fixed phase ambiguities.

Description

technical field [0001] Embodiments of the present invention relate to the communication field, and more specifically, relate to a method, device, decoding method, receiver and system for detecting phase ambiguity. Background technique [0002] In order to meet the needs of the development of multimedia communication services, the modulation and demodulation technology that improves spectrum utilization has increasingly become an important means of communication transmission. MPSK (Multiple Phase Shift Keying) or MQAM (Multiple Quadrature Amplitude Modulation) modulation is currently the two most commonly used modulation and demodulation methods. The phase of the carrier is used to convey information. When using these modulation methods, the transmitter usually uses a certain phase as a reference, so there must be such a fixed reference phase as a reference in the receiving system. If there is a phase change in the reference phase, the recovered data information will also h...

AI Technical Summary

Problems solved by technology

However, in order to ensure performance, differential demodulation is usually decoded by the highly complex BCJR (Bahl, Cocke, Jelinek and Raviv) method, and then combined with FEC (Forward Error Correction) decoding for iterative detection. The complexity is very high, which affects its application in practical systems

[0004] The second method provides a method to directly use LDPC (Low-Density Parity-Check) code to eliminate the phase ambiguity of π in BPSK (Binary Phase Shift Keying, binary phase shift keying) modulation And the device overcomes the deficiency of high complexity of differential modulation joint iterative detection, but the phase ambiguity (π) that can be corrected is limited, and there are too many restrictions on the parity check matrix, which easily affects its performance under Gaussian white noise

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