CSI feedback for closed-loop MIMO-OFDM systems based on B-splines

Ren Shian Chen, Ming Xian Chang

Research output: Chapter in Book/Report/Conference proceedingConference contribution


In this paper, we propose a feedback algorithm based on the B-spline models of channel responses(CRs) variation across subchannels. We determine the coefficients of the B-splines based on the least-squares fitting principle. The coefficients of the B-splines are fed back to the transmitter for the CRs reconstruction. In the feedback process, we also apply efficient quantization algorithms based on the Gaussian quantization. The simulation results verify that the proposed B-spline model has smaller coefficients variances, and this leads to smaller meansquares error than the Polynomial model [1] when using fewer number of feedback bits. The simulation results also show that the proposed algorithm can attain the upper bound of channel capacity for the precoded MIMO-OFDM system in the frequency-selective channel.

Original languageEnglish
Title of host publication2010 IEEE Globecom Workshops, GC'10
PublisherIEEE Computer Society
Number of pages5
ISBN (Print)9781424488650
Publication statusPublished - 2010
Event2010 IEEE Globecom Workshops, GC 2010 - Miami, United States
Duration: 2010 Dec 52010 Dec 10

Publication series

Name2010 IEEE Globecom Workshops, GC'10


Conference2010 IEEE Globecom Workshops, GC 2010
Country/TerritoryUnited States

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication


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