An SVD pre/post-rake for TDD CDMA systems

Jin Kyu Han, Jong Gwan Yook, Han Kyu Park

Research output: Contribution to conferencePaperpeer-review


Since reciprocal channels can be found in time division duplex (TDD) systems, TDD code division multiple access (CDMA) systems are capable of implementing a pre-rake structure as a pre-distortion technique. In this paper, we propose a singular value decomposition (SVD) pre/post-rake in which the rake combiner is utilized at both the transmitter and receiver. If the combining weights of the pre-rake and post-rake are determined by the singular value decomposition, then parallel sub-channels can be established in the eigen-space. We obtain the optimal information capacity by applying the water-filling solution to the SVD pre/post-rake. The SVD pre/post-rake provides remarkable capacity improvement without increasing the average transmit power or frequency bandwidth, since multiple data symbols can be reliably transmitted through the parallel sub-channels.

Original languageEnglish
Number of pages5
Publication statusPublished - 2002
EventGLOBECOM'02 - IEEE Global Telecommunications Conference - Taipei, Taiwan, Province of China
Duration: 2002 Nov 172002 Nov 21


OtherGLOBECOM'02 - IEEE Global Telecommunications Conference
Country/TerritoryTaiwan, Province of China

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering
  • Global and Planetary Change


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