Publication

VLSI implementation of the sphere decoding algorithm

2004
Conference Papers

Abstract

Maximum likelihood detection is an essential part of high-performance multiple-input-multiple-output (MIMO) communication systems. While it is attractive due to its superior performance (in terms of BER) its complexity using a straightforward exhaustive search grows exponentially with the number of antennas and the order of the modulation scheme. Sphere decoding is a promising method to reduce the average decoding complexity significantly without compromising performance. This paper discusses the VLSI implementation of the sphere decoder and presents the first implementation of the algorithm that does not compromise BER performance.

Official source

https://infoscience.epfl.ch/entities/publication/7da7f863-0106-438c-ba62-3f33f9763126

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2004
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/7da7f863-0106-438c-ba62-3f33f9763126

About this result

Related concepts (26)

Modulation

In electronics and telecommunications, modulation is the process of varying one or more properties of a periodic waveform, called the carrier signal, with a separate signal called the modulation signal that typically contains information to be transmitted. For example, the modulation signal might be an audio signal representing sound from a microphone, a video signal representing moving images from a video camera, or a digital signal representing a sequence of binary digits, a bitstream from a computer.

Phase modulation

Phase modulation (PM) is a modulation pattern for conditioning communication signals for transmission. It encodes a message signal as variations in the instantaneous phase of a carrier wave. Phase modulation is one of the two principal forms of angle modulation, together with frequency modulation. In phase modulation, the instantaneous amplitude of the baseband signal modifies the phase of the carrier signal keeping its amplitude and frequency constant.

Hamming bound

In mathematics and computer science, in the field of coding theory, the Hamming bound is a limit on the parameters of an arbitrary block code: it is also known as the sphere-packing bound or the volume bound from an interpretation in terms of packing balls in the Hamming metric into the space of all possible words. It gives an important limitation on the efficiency with which any error-correcting code can utilize the space in which its code words are embedded. A code that attains the Hamming bound is said to be a perfect code.