Layered Space-Time Index Coding

Abstract

Multicasting $K$ independent messages via multiple-input multiple-output (MIMO) channels to multiple users where each user already has a subset of messages as side information is studied. A general framework of constructing layered space-time index coding (LSTIC) from a large class of space-time block codes (STBC), including perfect STBC, is proposed. We analyze the proposed LSTIC and show that it provides minimum determinant gains that are exponential with the amount of information contained in the side information for any possible side information. When constructed over a perfect STBC, the proposed LSTIC is itself a perfect STBC and hence many desired properties are preserved. To illustrate, we construct LSTIC over the following well-known STBCs: Golden code; $3\times 3$, $4\times 4$, $6\times 6$ perfect STBCs; and Alamouti code. Simulation results show that the obtained side information gain can be well predicted by our analysis.

arXiv comment27 pages, 5 figures

References in corpus (6)

• Broadcast Capacity Region of Two-Phase Bidirectional Relaying
• Lattice Index Coding
• Index Codes for the Gaussian Broadcast Channel using Quadrature Amplitude Modulation
• Optimal Coding Schemes for the Three-Receiver AWGN Broadcast Channel with Receiver Message Side Information
• Joint Network and Gelfand-Pinsker Coding for 3-Receiver Gaussian Broadcast Channels with Receiver Message Side Information
• Golden-Coded Index Coding