A low-complexity noncoherent iterative space-time demodulator

Ruey Yi Wei; Yu Wei Hsu; Chih Chong Pan

doi:10.1109/TCOMM.2009.10.080056

A low-complexity noncoherent iterative space-time demodulator

Ruey Yi Wei, Yu Wei Hsu, Chih Chong Pan

Department of Communication Engineering

Research output: Contribution to journal › Article › peer-review

6 Scopus citations

Abstract

Turbo coded unitary space-time modulation (USTM) can provide large coding gain as compared to uncoded USTM. Because the noncoherent space-time maximum a posteriori demodulator is very complicated, in this letter, we propose a new low-complexity noncoherent iterative space-time demodulator for the USTM constructed from pilot symbolassisted modulation. The proposed demodulator utilizes both hard and soft decisions from the turbo decoder to simplify the computational task as well as produce reliable soft outputs. Several examples demonstrate that this demodulator has both low complexity and good error performance.

Original language	English
Pages (from-to)	2895-2898
Number of pages	4
Journal	IEEE Transactions on Communications
Volume	57
Issue number	10
DOIs	https://doi.org/10.1109/TCOMM.2009.10.080056
State	Published - 2009

Keywords

Demodulator
Space-time code
Turbo code
Unitary space-time modulation

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10.1109/TCOMM.2009.10.080056

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abstract = "Turbo coded unitary space-time modulation (USTM) can provide large coding gain as compared to uncoded USTM. Because the noncoherent space-time maximum a posteriori demodulator is very complicated, in this letter, we propose a new low-complexity noncoherent iterative space-time demodulator for the USTM constructed from pilot symbolassisted modulation. The proposed demodulator utilizes both hard and soft decisions from the turbo decoder to simplify the computational task as well as produce reliable soft outputs. Several examples demonstrate that this demodulator has both low complexity and good error performance.",

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AU - Wei, Ruey Yi

AU - Hsu, Yu Wei

AU - Pan, Chih Chong

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N2 - Turbo coded unitary space-time modulation (USTM) can provide large coding gain as compared to uncoded USTM. Because the noncoherent space-time maximum a posteriori demodulator is very complicated, in this letter, we propose a new low-complexity noncoherent iterative space-time demodulator for the USTM constructed from pilot symbolassisted modulation. The proposed demodulator utilizes both hard and soft decisions from the turbo decoder to simplify the computational task as well as produce reliable soft outputs. Several examples demonstrate that this demodulator has both low complexity and good error performance.

AB - Turbo coded unitary space-time modulation (USTM) can provide large coding gain as compared to uncoded USTM. Because the noncoherent space-time maximum a posteriori demodulator is very complicated, in this letter, we propose a new low-complexity noncoherent iterative space-time demodulator for the USTM constructed from pilot symbolassisted modulation. The proposed demodulator utilizes both hard and soft decisions from the turbo decoder to simplify the computational task as well as produce reliable soft outputs. Several examples demonstrate that this demodulator has both low complexity and good error performance.

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KW - Space-time code

KW - Turbo code

KW - Unitary space-time modulation

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A low-complexity noncoherent iterative space-time demodulator

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Keywords

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