Space time coding schemes for 4 or more antennas

• Autor(a) principal: Correia, Américo
• Data de Publicação: 2002
• Outros Autores: Silva, Mário Marques da
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
• Texto Completo: http://hdl.handle.net/11144/4213
• topic: Rayleigh fading; antenna transmission diversity; multi-dimensional constellation and rotation; inter-symbol interference

In this paper we present a new space time transmit diversity (STTD) scheme for M4 transmit antennas and one receive antenna. The new diversity scheme belongs to the open loop class and consists of an extension to the work presented in [1,2,3]. Another hybrid scheme that combines open and close loop classes is also presented. The coding rate of the new scheme is one and in spite of the presence of inter-symbol interference it may achieve the full diversity after applying a multi-dimensional orthonormal rotation to the original constellation. For each coding scheme every block with 8 received symbols is detected using a maximum likelihood decoding algorithm to get the estimated maximum likelihood sequence. Q-QAM modulations are analysed.