On the Capacity of the Noncausal Relay Channel

Details On the Capacity of the Noncausal Relay Channel On the Capacity of the Noncausal Relay Channel

2011-03-22

arxiv.org/abs/1103.4177v1

Computer Science

Information Theory

16 pages, 5 figures

Scientific paper

This paper studies the noncausal relay channel, also known as the relay channel with unlimited lookahead, introduced by El Gamal, Hassanpour, and Mammen. Unlike the standard relay channel model, where the relay encodes its signal based on the previous received output symbols, the relay in the noncausal relay channel encodes its signal as a function of the entire received sequence. In the existing coding schemes, the relay uses this noncausal information solely to recover the transmitted message and then cooperates with the sender to communicate this message to the receiver. However, it is shown in this paper that by applying the Gelfand--Pinsker coding scheme, the relay can take further advantage of the noncausally available information, which can achieve strictly higher rates than existing coding schemes. This paper also provides a new upper bound on the capacity of the noncausal relay that strictly improves upon the cutset bound. These new lower and upper bounds on the capacity coincide for the class of degraded noncausal relay channels and establish the capacity for this class.

Affiliated with

Also associated with

No associations

Rating

On the Capacity of the Noncausal Relay Channel 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 On the Capacity of the Noncausal Relay Channel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and On the Capacity of the Noncausal Relay Channel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-48111