Mutual Information of IID Complex Gaussian Signals on Block Rayleigh-Faded Channels
Author
Summary, in English
We present a method to compute, quickly and efficiently, the mutual information achieved by an independent identically distributed (IID) complex Gaussian signal on a block Rayleigh-faded channel without side information at the receiver. The method accommodates both scalar and multiple-input multiple-output (MIMO) settings. Operationally, this mutual information represents the highest spectral efficiency that can be attained using Gaussian codebooks. Examples are provided that illustrate the loss in spectral efficiency caused by fast fading and how that loss is amplified when multiple transmit antennas are used. These examples are further enriched by comparisons with the channel capacity under perfect channel-state information at the receiver, and with the spectral efficiency attained by pilot-based transmission.
Department/s
Publishing year
2012
Language
English
Pages
331-340
Publication/Series
IEEE Transactions on Information Theory
Volume
58
Issue
1
Document type
Journal article
Publisher
IEEE - Institute of Electrical and Electronics Engineers Inc.
Topic
- Electrical Engineering, Electronic Engineering, Information Engineering
Keywords
- MIMO
- multiantenna
- mutual information
- non-coherent
- spectral
- efficiency
- wireless communications
Status
Published
Research group
- Telecommunication Theory
ISBN/ISSN/Other
- ISSN: 0018-9448