Error exponents for backhaul-constrained parallel relay networks

Yilmaz, Erhan; Knopp, Raymond; Gesbert, David

PIMRC 2010, 21st Annual IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, September 26-29, Istanbul, Turkey

In this paper, we assess the random coding error

exponents (EEs) corresponding to decode-and-forward (DF),

compress-and-forward (CF) and quantize-and-forward (QF) relaying

strategies for a parallel relay network (PRN), consisting

of a single source and two relays. Moreover, through numerical

analysis we show that the EEs achieved by using QF relaying

along with non-Gaussian signaling (coded modulation, M-QAM)

at the source and symbol-by-symbol uniform scalar quantizers

(uSQs) at the relays is better than that achieved by DF and CF

relaying strategies when the system is in the low signal-to-noise

ratio (SNR) regime and the backhaul capacity is sufficient. This

behavior is due to the structure of coded modulation, as opposed

to Gaussian signaling, which leads to better EEs for simple

relaying strategies compared to its more complex counterparts.

Detail

Document

DOI

BIBTEX

Type:

Conference

City:

Istanbul

Date:

2010-09-26

Department:

Communication systems

Eurecom Ref:

3129

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