Performance analysis of the cooperative ZP-OFDM: Diversity, capacity and complexity

Performance analysis of the cooperative ZP-OFDM: Diversity, capacity and complexity

Lu, H.
Xu, T.
Nikookar, H.
Ligthart, L.P.

Electrical Engineering, Mathematics and Computer Science

Telecommunications

2011-12-31

In this paper, we investigate the diversity, capacity and complexity issues of cooperative Zero-Padding (ZP)-Orthogonal FrequencyDivisionMultiplexing (OFDM) communication. We consider cooperative ZP-OFDM communication over a multipath Rayleigh channel and with multiple Carrier Frequency Offsets (CFOs) existing at different relays. We use a cooperative tall Toeplitz scheme to achieve full cooperative and multipath diversity, while simultaneously combat the CFOs. Importantly, this full diversity scheme only requires Linear Equalizers (LEs), such as Zero-Forcing (ZF) and Minimum Mean Square Error (MMSE) equalizers, an issue which reduces the system complexity when compared to a Maximum-Likelihood Equalizer (MLE) or other near-MLEs. Theoretical analysis of the proposed cooperative tall Toeplitz scheme is provided on the basis of the analytical upper bound of the channel orthogonality deficiency derived in this paper. Utilizing only low-complexity linear equalizers, theoretical analysis and simulation results show that the proposed Toeplitz scheme achieves the full cooperative, multipath and outage diversity.

Cooperative communication · OFDM · Zero-padding · Diversity · Capacity · Complexity · Carrier frequency offsets · Tall Toeplitz · Linear equalizers · Orthogonality deficiency

http://resolver.tudelft.nl/uuid:5cbdc1b5-ab05-40ab-85c7-7f0995e23403

https://doi.org/10.1007/s11277-011-0470-9

Springer

0929-6212

https://doi.org/10.1007/s11277-011-0470-9

Wireless Personal Communications, 1-22. (2011)

Institutional Repository

journal article

(c) 2011 Lu, H., Xu, T., Nikookar, H., Ligthart, L.P.