Multiple Access Channels with Generalized Feedback
نویسنده
چکیده
A multiple access channel (MAC) with generalized feedback (GF) is a communication network where two or more sources transmit information to a single destination, and each source observes a different feedback from the channel output. Such a channel with two users is shown in Fig. 1, where W1,W2 are the messages to be transmitted to the receiver, X1, X2 are signals transmitted by the encoders, Y is the channel output, Y1 and Y2 are feedback to encoder 1 and 2 respectively, and Ŵ1 and Ŵ2 are the decoded messages.
منابع مشابه
Bounds for Multiple-Access Relay Channels with Feedback via Two-way Relay Channel
In this study, we introduce a new two-way relay channel and obtain an inner bound and an outer bound for the discrete and memoryless multiple access relay channels with receiver-source feedback via two-way relay channel in which end nodes exchange signals by a relay node. And we extend these results to the Gaussian case. By numerical computing, we show that our inner bound is the same with o...
متن کاملMultiuser Detection for Vector Multiple Access Channels Using Generalized Decision Feedback Equalization
This paper considers the optimal multiuser detection problem for the vector Gaussian multiple access channel with multiple inputs and multiple outputs (MIMO). A practical bit-loading and multiuser decision feedback scheme based on generalized decision feedback equalization (GDFE) is proposed. This GDFE-based detection scheme, when used with an optimized transmitter, achieves the extreme points ...
متن کاملOutage Probability Bound and Diversity Gain for Ultra-Wideband Multiple-Access Relay Channels with Correlated Noises
In this paper, Ultra-wideband (UWB) multiple access relay channel with correlated noises at the relay and receiver is investigated. We obtain outer and inner bounds for the IEEE 802.15.3a UWB multiple access relay channel, and also, a diversity gain bound. Finally, we evaluate some results numerically and show that noise correlation coefficients play important role in determining relay position.
متن کاملExtension of the Coverage Region of Multiple Access Channels by Using a Relay
From practical and theoretical viewpoints, performance analysis of communication systems by using information-theoretic results is important. In this paper, based on our previous work on Multiple Access Channel (MAC) and Multiple Access Relay Channel (MARC), we analyze the impact of a relay on the fundamental wireless communications concept, i.e., coverage region of MARC, as a basic model for u...
متن کاملLinear Sum Capacity for Gaussian Multiple Access Channels with Feedback
The capacity region of the N -sender additive white Gaussian noise (AWGN) multiple access channel (MAC) with feedback is not known in general, despite significant contributions by Cover, Leung, Ozarow, Thomas, Pombra, Ordentlich, Kramer, and Gastpar. This paper studies the class of generalized linear feedback codes that includes (nonlinear) nonfeedback codes at one extreme and the linear feedba...
متن کامل