Pre-Rake System Applied with Frequency Domain Equalization In Multi-Code TDD-CDMA
Conference: PIMRC 2005 - 16th Annual IEEE International Symposium on Personal Indoor and Mobile Radio Communications
09/11/2005 - 09/14/2005 at Berlin, Germany
Proceedings: PIMRC 2005
Pages: 5Language: englishTyp: PDF
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Authors:
Lee, Jun Hwan; Nakagawa, Masao (Dept. of Information and Computer Science, KEIO University, Japan)
Abstract:
In this paper we propose a Pre-rake system with a frequency domain equalizer at multi-code transmission. The Pre-rake system has been well known technology in TDD-CDMA to make a mobile station (MS) simple. However, it still has a residual path diversity loss. To gather all the residual paths requires an additional hardware such as a rake combiner to MS. For the reason Pre/Post-rake system has already been proposed, and it could increase the performance gain comparing with a Pre-rake only system by obtaining more path diversity. In the mean time, it has been verified that the maximal ratio post-rake combiner (MRC) at time domain can be designed with a less hardware complexity with a frequency domain MRC (MRC-FDE) and its performance is almost the same without considering the power loss due to the insertion of a cyclic prefix (CP). The paper introduces Pre-rake/FDE and shows the system design and presents with the numerical performance results.