Sequence detection method and device
A technology for sequence detection and judgment, which is applied to the shaping network, digital transmission system, electrical components, etc. in the transmitter/receiver. It can solve the problems of poor detection performance, large system interference, and poor robustness. Detection performance, good robustness effect
Active Publication Date: 2016-06-22
LEADCORE TECH
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[0007] When high-order modulation is used and the interference of the system is large, for example, when the matched filter design of the receiving front end is unreasonable, the detection performance of the above scheme is very poor; or, the robustness of the above scheme is not good
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[0028] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.
[0029] figure 2 As the first embodiment of the present invention.
[0030] figure 2 A general functional block diagram of a sequence detection scheme is proposed for an embodiment of the present invention. Including: time domain conversion to frequency domain module 201, interference elimination module 202, phase error calculation module 203, Viterbi module 204, decision bit modification module 205 and buffer module 206; and the time domain conversion to frequency domain module 201 and interference The elimination module ...
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The present invention discloses a sequence detection method and device. The device comprises an interference elimination module, a phase error calculation module, a Viterbi module, a judgment bit correction module and a cache module. A frequency domain sample signal is inputted, the interference elimination is carried out, and a judgment bit and a judgment variable are obtained; the judgment bit enters into the cache module so as to match the processing time delay introduced by the Viterbi module, the judgment variable and the judgment bit are inputted into the phase error calculation module so as to calculate a judgment error; an obtained judgment error variable is inputted to the Viterbi module, multiple judgment error variables are used to carry out combined detection, and a corrected judgment error variable value is obtained; the corrected judgment error variable value is used to correct the judgment bit, and finally an outputted correct bit is obtained. The sequence detection method and device can be applied to a higher-order differential modulation signal and have good detection performance and good robustness.
Description
technical field [0001] The present invention relates to the technical field of sequence detection, in particular to a sequence detection method and device. Background technique [0002] The demodulation technology of signal system is usually divided into coherent demodulation and non-coherent demodulation. Coherent demodulation usually requires the receiver to recover the carrier frequency and carrier phase first, and then use channel estimation technology and equalization technology to demodulate, recover and judge the received signal. However, it is usually difficult for the receiver to obtain the same frequency and phase. The non-coherent demodulation technology does not require the receiver to achieve the same frequency and phase, so it is relatively easy to implement, but the demodulation performance of the non-coherent demodulation technology is usually worse than that of the coherent demodulation technology. [0003] A very important type of demodulation technology ...
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Login to View More IPC IPC(8): H04L1/00H04L25/02H04L25/03
Inventor 宋挥师
Owner LEADCORE TECH