Soft Detection of CPM in Multipath Fading

Author

Pham, Thach ; Martin, Philippa A. ; Taylor, D.P. ; Horn, Clive

Author_Institution

ECE Dept., Univ. of Canterbury, Christchurch, New Zealand

fYear

2013

fDate

2-5 June 2013

Firstpage

1

Lastpage

5

Abstract

We consider single-h continuous phase modulation (CPM) systems that use linear prediction receivers with coefficient look up table (LUT) for mitigating the effect of multipath fading. This type of receiver shows superior performance over conventional ones; however, high channel delay spread and fast fading can still lead to a high error floor in its performance. A sub-optimal soft/iterative detection based on the soft output Viterbi algorithm (SOVA) is presented for reducing such error floors while maintaining low complexity. The design is extended with a simple spatial diversity combining scheme and the utilization of multiple coefficient LUTs. The proposed approach allows a significant performance gain to be achieved.

Keywords

Viterbi detection; continuous phase modulation; diversity reception; fading channels; iterative decoding; mobile communication; multipath channels; radio receivers; table lookup; CPM soft detection; SOVA; coefficient look up table; continuous phase modulation systems; error floor reduction; fast fading; high channel delay spread; linear prediction receivers; mobile communication systems; multipath fading effect mitigation; multiple coefficient LUT utilization; performance gain; soft output Viterbi algorithm; spatial diversity; spatial diversity combining scheme; suboptimal iterative detection; Delays; Demodulation; Diversity reception; Receivers; Reliability; Table lookup;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Spring), 2013 IEEE 77th

Conference_Location

Dresden

ISSN

1550-2252

Type

conf

DOI

10.1109/VTCSpring.2013.6692758

Filename

6692758