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Reduced-complexity non-coherent soft-decision-aided DAPSK dispensing with channel estimation

Reduced-complexity non-coherent soft-decision-aided DAPSK dispensing with channel estimation
Reduced-complexity non-coherent soft-decision-aided DAPSK dispensing with channel estimation
Differential Amplitude Phase Shift Keying (DAPSK), which is also known as star-shaped QAM has implementational advantages not only due to dispensing with channel estimation, but also as a benefit of its low signal detection complexity. It is widely recognized that separately detecting the amplitude and the phase of a received DAPSK symbol exhibits a lower complexity than jointly detecting the two terms. However, since the amplitude and the phase of a DAPSK symbol are affected by the correlated magnitude fading and phase-rotations, detecting the two terms completely independently results in a performance loss, which is especially significant for soft-decision-aided DAPSK detectors relying on multiple receive antennas. Therefore, in this contribution, we propose a new soft-decision-aided DAPSK detection method, which achieves the optimum DAPSK detection capability at a substantially reduced detection complexity. More specifically, we link each a priori soft input bit to a specific part of the channel's output, so that only a reduced subset of the DAPSK constellation points has to be evaluated by the soft DAPSK detector. Our simulation results demonstrate that the proposed soft DAPSK detector exhibits a lower detection complexity than that of independently detecting the amplitude and the phase, while the optimal performance of DAPSK detection is retained.
0018-9545
2633-2643
Xu, Chao
349b7322-fd17-4fcd-a49f-c62afe284d50
Liang, Dandan
7ec17ba1-8959-4ee0-8f58-2e51c646ae23
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Xu, Chao
349b7322-fd17-4fcd-a49f-c62afe284d50
Liang, Dandan
7ec17ba1-8959-4ee0-8f58-2e51c646ae23
Ng, Soon Xin
e19a63b0-0f12-4591-ab5f-554820d5f78c
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Xu, Chao, Liang, Dandan, Ng, Soon Xin and Hanzo, Lajos (2013) Reduced-complexity non-coherent soft-decision-aided DAPSK dispensing with channel estimation. IEEE Transactions on Vehicular Technology, 62 (6), 2633-2643.

Record type: Article

Abstract

Differential Amplitude Phase Shift Keying (DAPSK), which is also known as star-shaped QAM has implementational advantages not only due to dispensing with channel estimation, but also as a benefit of its low signal detection complexity. It is widely recognized that separately detecting the amplitude and the phase of a received DAPSK symbol exhibits a lower complexity than jointly detecting the two terms. However, since the amplitude and the phase of a DAPSK symbol are affected by the correlated magnitude fading and phase-rotations, detecting the two terms completely independently results in a performance loss, which is especially significant for soft-decision-aided DAPSK detectors relying on multiple receive antennas. Therefore, in this contribution, we propose a new soft-decision-aided DAPSK detection method, which achieves the optimum DAPSK detection capability at a substantially reduced detection complexity. More specifically, we link each a priori soft input bit to a specific part of the channel's output, so that only a reduced subset of the DAPSK constellation points has to be evaluated by the soft DAPSK detector. Our simulation results demonstrate that the proposed soft DAPSK detector exhibits a lower detection complexity than that of independently detecting the amplitude and the phase, while the optimal performance of DAPSK detection is retained.

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Published date: July 2013
Organisations: Southampton Wireless Group

Identifiers

Local EPrints ID: 348406
URI: http://eprints.soton.ac.uk/id/eprint/348406
ISSN: 0018-9545
PURE UUID: 5ef93519-40f4-4a03-b3ce-0f7148d9475b
ORCID for Soon Xin Ng: ORCID iD orcid.org/0000-0002-0930-7194
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

Catalogue record

Date deposited: 13 Feb 2013 11:48
Last modified: 07 Oct 2020 05:50

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