Receiver Design for SIMO-OFDM Systems with Insufficient Cyclic Prefix

Author

Tri Pham ; Martin, Philippa A. ; Woodward, Graeme ; Prasad, K. ; Horn, Clive

Author_Institution

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

fYear

2014

fDate

14-17 Sept. 2014

Firstpage

1

Lastpage

5

Abstract

We investigate orthogonal frequency-division multiplexing (OFDM) systems that operate with limited or insufficient cyclic prefix (CP). Using a shorter CP can enable a significant reduction in bandwidth usage or enable range extension for OFDM networks. The cost is increased inter-symbol interference (ISI) and inter-carrier interference (ICI). Here, the effect of ICI and ISI on the received signal is analyzed. We then propose a two-stage detector for single input multiple output (SIMO) systems with two receive antennas. Taking advantage of the spatial diversity, the first detection stage uses a low complexity zero-forcing (ZF) or minimum mean square error (MMSE) method to estimate the transmitted data for aiding the second stage trellis based detector. The proposed schemes provide satisfactory performance for delay spreads up to 3.5 times the CP.

Keywords

OFDM modulation; covariance matrices; intercarrier interference; intersymbol interference; mean square error methods; radio receivers; signal detection; CP; ICI; ISI; MMSE method; OFDM networks; SIMO-OFDM systems; ZF method; cyclic prefix; detection stage; intercarrier interference; intersymbol interference; minimum mean square error method; orthogonal frequency-division multiplexing systems; receiver design; single input multiple output systems; spatial diversity; trellis based detector; zero-forcing method; Delays; Detectors; Interference; Maximum likelihood estimation; OFDM; Receivers; Signal to noise ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference (VTC Fall), 2014 IEEE 80th

Conference_Location

Vancouver, BC

Type

conf

DOI

10.1109/VTCFall.2014.6966151

Filename

6966151