Title :
Improved signal design for bandwidth efficient multiple access
Author :
Kapur, Ateet ; Varanasi, Mahesh
Author_Institution :
Colorado Univ., Boulder, CO, USA
Abstract :
The problem of optimizing signals for the Gaussian multiple access channel under a quality of service (QoS) constraint is addressed. In particular, the bandwidth efficient multiple access (BEMA) approach (Varanasi, M.K. and Guess, T., IEEE Trans. Commun., vol.49,no.5, p.844-54, 2001) is considered, wherein signals are designed at the base station and fed back to, and for use by, uplink transmitters, in order to minimize a strict bandwidth while ensuring that each user meets a rate-specified QoS constraint. A new recursive, greedy algorithm for signal design is proposed that exactly meets the QoS requirements. Preliminary analysis and numerical examples suggest it is optimal.
Keywords :
Gaussian channels; algorithm theory; least mean squares methods; minimisation; multi-access systems; quality of service; signal detection; Gaussian channel; MMSE detection; QoS constraint; bandwidth efficient multiple access; correlated waveform multiple access; greedy algorithm; quality of service constraint; signal design; Algorithm design and analysis; Bandwidth; Constraint optimization; Detectors; Greedy algorithms; Information theory; Power system modeling; Quality of service; Signal design; Transmitters;
Conference_Titel :
Information Theory Workshop, 2003. Proceedings. 2003 IEEE
Print_ISBN :
0-7803-7799-0
DOI :
10.1109/ITW.2003.1216688
