An interference nulling based channel independent precoding for MIMO-OFDM systems with insufficient cyclic prefix

Yuansheng Jin; Xiang Gen Xia

doi:10.1109/TCOMM.2012.092612.110740

An interference nulling based channel independent precoding for MIMO-OFDM systems with insufficient cyclic prefix

Yuansheng Jin^*, Xiang Gen Xia

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

In this paper, a new interference nulling based channel independent precoding for MIMO-OFDM systems of n_t transmit and n_r receive antennas with insufficient cyclic prefix (CP) is proposed. By employing the notion of interference nulling, we show that our proposed channel independent precoding scheme can eliminate the inter-block interference (IBI) caused by the insufficient CP with higher bandwidth efficiency than the conventional zero-padded or a sufficient CP added block transmission system when n_r≤ n_t. It is also shown that when n _r>n_t, the IBI can be eliminated without the need of any zero-padding or adding CP or precoding when the OFDM block length is not too small.

Original language	English
Article number	6328209
Pages (from-to)	131-143
Number of pages	13
Journal	IEEE Transactions on Communications
Volume	61
Issue number	1
DOIs	https://doi.org/10.1109/TCOMM.2012.092612.110740
Publication status	Published - 2013
Externally published	Yes

Keywords

MIMO-OFDM
insufficient cyclic prefix (CP)
interference alignment (IA)
precoding

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10.1109/TCOMM.2012.092612.110740

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AB - In this paper, a new interference nulling based channel independent precoding for MIMO-OFDM systems of nt transmit and nr receive antennas with insufficient cyclic prefix (CP) is proposed. By employing the notion of interference nulling, we show that our proposed channel independent precoding scheme can eliminate the inter-block interference (IBI) caused by the insufficient CP with higher bandwidth efficiency than the conventional zero-padded or a sufficient CP added block transmission system when nr≤ nt. It is also shown that when n r>nt, the IBI can be eliminated without the need of any zero-padding or adding CP or precoding when the OFDM block length is not too small.

KW - MIMO-OFDM

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KW - interference alignment (IA)

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ER -

An interference nulling based channel independent precoding for MIMO-OFDM systems with insufficient cyclic prefix

Abstract

Keywords

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