Computer Science – Information Theory
Scientific paper
2010-03-31
Computer Science
Information Theory
37 pages, 15 figures, submitted to IEEE Transactions on Information Theory
Scientific paper
Linear receivers are often used to reduce the implementation complexity of multiple antenna systems. In a traditional linear receiver architecture, the receive antennas are used to separate out the codewords sent by each transmit antenna, which can then be decoded individually. Although easy to implement, this approach can be highly sub-optimal when the channel matrix is near singular. This paper develops a new linear receiver architecture that uses the receive antennas to create an effective channel matrix with integer-valued entries. Rather than attempting to recover transmitted codewords directly, the decoder recovers integer combinations of the codewords according to the entries of the effective channel matrix. The codewords are all generated using the same linear code which guarantees that these integer combinations are themselves codewords. If the effective channel is full rank, these integer combinations can then be digitally solved for the original codewords. This paper focuses on the special case where there is no coding across transmit antennas. In this setting, the integer-forcing linear receiver significantly outperforms traditional linear architectures such as the decorrelator and MMSE receiver. In the high SNR regime, the proposed receiver attains the optimal diversity-multiplexing tradeoff for the standard MIMO channel. It is further shown that in an extended MIMO model with interference, the integer-forcing linear receiver achieves the optimal generalized degrees-of-freedom.
Erez Uri
Gastpar Michael
Nazer Bobak
Zhan Jiening
No associations
LandOfFree
Integer-Forcing Linear Receivers does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Integer-Forcing Linear Receivers, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Integer-Forcing Linear Receivers will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-579499