Details

Autor(en) / Beteiligte

• Pengfei Xia
• Giannakis, G.B.

Titel

Design and analysis of transmit-beamforming based on limited-rate feedback

Ist Teil von

• IEEE transactions on signal processing, 2006-05, Vol.54 (5), p.1853-1863

Ort / Verlag

New York, NY: IEEE

Erscheinungsjahr

2006

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• This paper deals with design and performance analysis of transmit beamformers for multiple-input multiple-output (MIMO) systems based on bandwidth-limited information that is fed back from the receiver to the transmitter. By casting the design of transmit beamforming based on limited-rate feedback as an equivalent sphere vector quantization (SVQ) problem, multiantenna beamformed transmissions through independent and identically distributed (i.i.d.) Rayleigh fading channels are first considered. The rate-distortion function of the vector source is upper-bounded, and the operational rate-distortion performance achieved by the generalized Lloyd's algorithm is lower-bounded. Although different in nature, the two bounds yield asymptotically equivalent performance analysis results. The average signal-to-noise ratio (SNR) performance is also quantified. Finally, beamformer codebook designs are studied for correlated Rayleigh fading channels, and a low-complexity codebook design that achieves near-optimal performance is derived.