Joint data detection and channel estimation for coded and uncoded continuous phase modulation signals

Wang, Wenwen; Abeysekera, S.S.

doi:10.1002/wcm.2502

Cited by 2 publications

(2 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Continuous phase modulation (CPM) has the advantages of a continuous phase, constant envelope, high spectrum utilization, and excellent bandwidth efficiencies [1,2]. These characteristics are more notable for satellite systems with less power and fewer bandwidth resources, such as satellite navigation [3][4][5], satellite mesh networks [6,7], and satellite communication [8,9].…”

Section: Introductionmentioning

confidence: 99%

Optimized Design for NB-LDPC-Coded High-Order CPM: Power and Iterative Efficiencies

Xue

Wang

Sun³

et al. 2020

Symmetry

View full text Add to dashboard Cite

In this paper, a non-binary low-density parity-check (NB-LDPC) coded high-order continuous phase modulation (CPM) system is designed and optimized to improve power and iterative efficiencies. Firstly, the minimum squared normalized Euclidean distance and the 99% double-sided power bandwidth are introduced to design a competitive CPM, improving its power efficiency under a given code rate and spectral efficiency. Secondly, a three-step method based on extrinsic information transfer (EXIT) and entropy theory is used to design NB-LDPC codes, which reduces the convergence threshold approximately 0.42 and 0.58 dB compared with the candidate schemes. Thirdly, an extrinsic information operation is proposed to address the positive feedback issue in iterative detection and decoding and the value of bit error rate (BER) can approximately be reduced by 5×10−3. Finally, iteration optimization employing the EXIT chart and mutual information between demodulation and decoding is performed to achieve a suitable tradeoff for the communication reliability and iterative decoding delay. Simulation results show that the resulting scheme provides an approximately 3.95 dB coding gain compared to the uncoded CPM and achieves approximately 0.5 and 0.7 dB advantages compared with the candidate schemes. The resulting NB-LDPC-coded high-order CPM for a given code rate and spectral efficiency converges earlier into a turbo cliff region compared with other competitors and significantly improves power and iterative efficiencies.

show abstract

Section: Introductionmentioning

confidence: 99%

Optimized Design for NB-LDPC-Coded High-Order CPM: Power and Iterative Efficiencies

Xue

Wang

Sun³

et al. 2020

Symmetry

View full text Add to dashboard Cite

show abstract

“…The answer to the remaining question is the design of iterative receiver. Iterative receiver architecture gains increasing attention . In iterative receivers, the extrinsic information is exchanged between two soft‐input–soft‐output (SISO) blocks.…”

Section: Introductionmentioning

confidence: 99%

GF(q)-based precoding: information theoretical analysis and performance evaluation

Jiang

Zhang

Meng

et al. 2016

Wirel. Commun. Mob. Comput.

View full text Add to dashboard Cite

In this paper, a new precoding scheme that is based on the operations in Galois field of size q = 2m(GF(q)) is proposed. Generally, precoding is a processing technique at transmitters to match the input signal to the channel in order to achieve optimal channel capacity through fully utilizing space, time, and frequency diversity. Precoding schemes can be divided into two main categories: linear precoding and nonlinear precoding. It has been shown from an information theoretical aspect that both the linear and nonlinear precoding schemes can achieve the optimal channel capacity. Our proposed GF(q)‐based precoding scheme is a nonlinear precoding technique, and the idea originates from finite inputs of the modulated symbols. When representing the modulated symbols and the elements in precoding matrix with the finite elements in Galois field of size q, and applying the operations defined in GF(q), we can obtain the precoded symbols that contains information of the original symbols. Starting from binary symmetry channel to additive Gaussian white noise channels, we have demonstrated that the proposed GF(q)‐based precoding schemes can enhance the system mutual information when the original finite inputs are not uniformly distributed. In addition, inspired by the mutual information analysis in binary symmetry channel, we investigated the selection of the precoding matrix in GF(q)‐based precoding schemes. As mutual information indicates the information about the source carried by the symbols of the channel output, greater mutual information enables the receivers to recover more information about the original source. To further utilize the greater mutual information brought by the proposed GF(q)‐based precoding schemes, we proposed a novel‐receiving structure by exchanging soft information between the GF(q) decoding block and channel decoding block. Simulation results show that the proposed iterative receiver improves the system bit error rate performance by 1 and 2 dB at the bit error rate level of 10 − 6 with binary phase shift keying and quadrature phase shift keying modulations, respectively. Inspired by the encouraging results of greater mutual information and better bit error rate performance, we are convinced that the proposed GF(q)‐based precoding schemes can be extended to fading channels and multiple input–multiple output systems to further approach channel capacity. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

Joint data detection and channel estimation for coded and uncoded continuous phase modulation signals

Cited by 2 publications

References 29 publications

Optimized Design for NB-LDPC-Coded High-Order CPM: Power and Iterative Efficiencies

Optimized Design for NB-LDPC-Coded High-Order CPM: Power and Iterative Efficiencies

GF(q)-based precoding: information theoretical analysis and performance evaluation

Contact Info

Product

Resources

About