PAPR reduction of TD-SCDMA with joint transmission technique

Norharyati Binti Harum, Tomoaki Ohtsuki

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

Abstract

Joint Detection (JD) technique is used to reduce intersymbol interference (ISI) and multiple access interference (MAI) in current downlink (DL) of Time-Division Synchronous Code-Division-Multiple-Access (TD-SCDMA). However, the technique requires significant calculation and channel estimator in mobile station (MS), causing complexity in MS. Using TDD features where received uplink channel impulse responses (CIRs) can be used in DL, Joint Transmission (JT) has been proposed. In JT, all of JD functions are removed into BS, thus a simple and low cost MS can be realized. However, studies of JT show that the JT increases transmission power. This may affect Peak to Average Power Ratio (PAPR) of the system. For a single path case, our result shows that JT increases overall transmitted power as well as average transmitted power, leading to lower PAPR. However, as JT multiplies CIRs with spreading codes before transmission, high PAPR might be occurred in multipath case. To avoid high PAPR, we propose a new approach of JT technique that can perform lower PAPR even in multipath case. The proposed technique selects certain paths instead of all paths used in JT processing so that PAPR becomes lower, while keeping good bit error rate (BER) performance.

Original languageEnglish
Title of host publicationISCIT 2010 - 2010 10th International Symposium on Communications and Information Technologies
Pages366-371
Number of pages6
DOIs
Publication statusPublished - 2010 Dec 1
Event2010 10th International Symposium on Communications and Information Technologies, ISCIT 2010 - Tokyo, Japan
Duration: 2010 Oct 262010 Oct 29

Publication series

NameISCIT 2010 - 2010 10th International Symposium on Communications and Information Technologies

Other

Other2010 10th International Symposium on Communications and Information Technologies, ISCIT 2010
CountryJapan
CityTokyo
Period10/10/2610/10/29

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Information Systems

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    Harum, N. B., & Ohtsuki, T. (2010). PAPR reduction of TD-SCDMA with joint transmission technique. In ISCIT 2010 - 2010 10th International Symposium on Communications and Information Technologies (pp. 366-371). [5664869] (ISCIT 2010 - 2010 10th International Symposium on Communications and Information Technologies). https://doi.org/10.1109/ISCIT.2010.5664869