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

Pengfei Xia, G.B. Giannakis
IEEE 60th Vehicular Technology Conference, 2004. VTC2004-Fall. 2004  
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.
more » ... 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. Index Terms-Beamforming, generalized Lloyd algorithm, Grassmannian line packing, limited rate feedback, multiple-input multiple-output (MIMO), partial channel state information, rate-distortion function, vector quantization, Welch bound.
doi:10.1109/vetecf.2004.1400315 fatcat:4x5kpbngrzff5ljw2wv7pqujtu