A Received Signal Detection Method for Large Compression Ratio ftn System

A technology for receiving signals and detection methods, which is applied in the receiving field based on the ultra-low complexity M-BCJR algorithm, and can solve problems such as poor performance, unacceptable FTN systems with large compression ratios, and estimation deviation of backward probability.

Active Publication Date: 2022-03-15
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
  • Description
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Problems solved by technology

[0008] The M*-BCJR algorithm only retains M states at each moment, and gathers the states that should have been discarded into the surviving states, which not only reduces the low complexity of the algorithm, but also ensures the stable output of soft information. However, the algorithm has a certain deviation in the estimation of the backward probability, which leads to its poor performance in the large compression ratio FTN system
Under the Ungerboeck model, the U-M-BCJR algorithm accurately estimates the backward probability by reasonably estimating the follow-up path, but requires exponential calculations, which is unacceptable for large compression ratio FTN systems

Method used

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  • A Received Signal Detection Method for Large Compression Ratio ftn System
  • A Received Signal Detection Method for Large Compression Ratio ftn System
  • A Received Signal Detection Method for Large Compression Ratio ftn System

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Embodiment

[0078] Based on the simulation parameters shown in Table 1, the present invention is applied to a single-carrier FTN system to verify its receiving performance.

[0079] Table 1 Simulation parameters

[0080] parameter configuration Modulation BPSK information bit length 4096 channel coder (7,5) convolutional code interleaver Random interleaver, depth 8192 Modulation pulse φ[n] Root raised cosine pulse (roll-off factor 0.3, 30 symbol periods) Compression factor τ 0.35 channel AWGN observation model ultra-minimum phase model smoothing filter 0.2z+0.6+0.2z -1

iteration gain factor g 0.3 iterations 50

[0081] Figure 6It is a structural block diagram of the single-carrier FTN system applying the method of the present invention in this embodiment. The source end inputs the binary information bit stream to be sent, and obtains the code after channel coding (convolutional code, turbo code, ...

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Abstract

The invention discloses a receiving signal detection method for a large compression ratio FTN system, belonging to the technical field of single-carrier communication. The present invention uses M-algorithm to carry out the forward recursive calculation of BCJR algorithm, with delay L β Calculate the LLR output, and use backtracking to traverse the state to avoid unstable LLR output. The present invention is used in a single-carrier FTN system based on the ultra-low complexity M-BCJR algorithm for the receiver to decode and detect the received signal. Compared with the existing M-BCJR algorithm, it can be realized under the same performance conditions , greatly reducing the complexity.

Description

technical field [0001] The invention belongs to the single-carrier communication technology in the communication field, and in particular relates to a receiving method based on an ultra-low complexity M-BCJR algorithm. Background technique [0002] With people's need for efficient and stable communication, wireless communication technology is constantly being upgraded. At present, the 4G network is fully deployed and mature, which brings people a higher quality and higher speed service experience. The emergence and development of wireless wearable devices, smart homes, mobile terminals, augmented reality, virtual reality, cloud office, leisure and entertainment, and autonomous driving have brought about exponential growth in communication users, the number of connected devices, and data volume, driving With the advent of the Internet of Things, big data and cloud era, this puts forward more stringent requirements on the capacity, speed and reliability of communication. How...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00
CPCH04L1/005H04L1/0052H04L1/0058H04L1/0059H04L1/0071
Inventor 刘光辉文山瞿辉洋徐增荣韩丰韩志强朱树元
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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