MIMO detection and equalization for single carrier systems using the alternating direction method of multipliers

• Autor(a) principal: Souto, N.
• Data de Publicação: 2016
• Outros Autores: Dinis, R.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/10071/12768
• topic: Alternating direction method of the multipliers (ADMM); Multiple-input multiple-output (MIMO) detection; Non-convex optimization; Single carrier-frequency domain equalization (SC-FDE)

In this letter, a multiple-input multiple-output detection algorithm based on the alternating direction method of the multipliers (ADMM) is proposed for single-carrier transmissions in time dispersive channels. The ADMM is applied as a heuristic to solve the maximum likelihood detection problem for arbitrary signal constellations formulated in the frequency domain. This approach allows most of the decoding steps to be implemented in the frequency domain with an overall reduced complexity cost. Simulation results show that the performances close to the matched filter bound can be attained in large problem sizes, even in overloaded scenarios.