Regular low-density parity-check (LDPC) code with normalized and UMP BP-based algorithms on fast rayleigh fading channel

Akinori Ohhashi, Tomoaki Ohtsuki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

6 Citations (Scopus)

Abstract

In this paper, we analyze and evaluate the performance of the regular LDPC codes with the normalized and IMP BP-based algorithms on a fast Rayleigh fading channel. For the short regular LDPC codes, we derive the formula of the normalization factor theoretically by using the probability density function (pdf) of the initial likelihood information for the normalized BP-based algorithm on the fast Rayleigh fading channel. For the long regular LDPC codes, we derive the optimal normalization factor for the normalized BP-based algorithm on the fast Rayleigh fading channel by using density evolution (DE). We also analyze the performance of the long regular LDPC codes with the I IMP BP-based algorithm on the fast Rayleigh fading channel by using DE. From the numerical and simulation results, we show that the optimum normalization factor for the short regular LDPC codes on the fast Rayleigh fading channel is different from that on the AWGN channel. We also show that for the short regular LDPC codes, the normalized BP-based algorithm outperforms the IMP BP-based algorithm, and has the performance very close to those of the BP algorithm. Furthermore, for the long regular LDPC codes, we show that the normalized BP-based algorithm outperforms the BP algorithm and the UMP BP-based algorithm on the fast Rayleigh fading channel. Therefore, for the short and long regular LDPC codes, the normalized BP-based algorithm is shown to be suitable as the decoding algorithm on the fast Rayleigh fading channel.

Original languageEnglish
Title of host publicationIEEE Vehicular Technology Conference
Pages2520-2524
Number of pages5
Volume60
Edition4
Publication statusPublished - 2004
Externally publishedYes
Event2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security - Los Angeles, CA, United States
Duration: 2004 Sep 262004 Sep 29

Other

Other2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security
CountryUnited States
CityLos Angeles, CA
Period04/9/2604/9/29

Fingerprint

Rayleigh fading
Fading channels
Probability density function
Decoding

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Ohhashi, A., & Ohtsuki, T. (2004). Regular low-density parity-check (LDPC) code with normalized and UMP BP-based algorithms on fast rayleigh fading channel. In IEEE Vehicular Technology Conference (4 ed., Vol. 60, pp. 2520-2524)

Regular low-density parity-check (LDPC) code with normalized and UMP BP-based algorithms on fast rayleigh fading channel. / Ohhashi, Akinori; Ohtsuki, Tomoaki.

IEEE Vehicular Technology Conference. Vol. 60 4. ed. 2004. p. 2520-2524.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ohhashi, A & Ohtsuki, T 2004, Regular low-density parity-check (LDPC) code with normalized and UMP BP-based algorithms on fast rayleigh fading channel. in IEEE Vehicular Technology Conference. 4 edn, vol. 60, pp. 2520-2524, 2004 IEEE 60th Vehicular Technology Conference, VTC2004-Fall: Wireless Technologies for Global Security, Los Angeles, CA, United States, 04/9/26.
Ohhashi, Akinori ; Ohtsuki, Tomoaki. / Regular low-density parity-check (LDPC) code with normalized and UMP BP-based algorithms on fast rayleigh fading channel. IEEE Vehicular Technology Conference. Vol. 60 4. ed. 2004. pp. 2520-2524
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