Direct sequence spread spectrum based PWM strategy for harmonic reduction and communication

Ruichi Wang, Zhengyu Lin, Jin Du, Jiande Wu, Xiangning He

Research output: Contribution to journalArticlepeer-review


Switched mode power supplies (SMPSs) are essential components in many applications, and electromagnetic interference is an important consideration in the SMPS design. Spread spectrum based PWM strategies have been used in SMPS designs to reduce the switching harmonics. This paper proposes a novel method to integrate a communication function into spread spectrum based PWM strategy without extra hardware costs. Direct sequence spread spectrum (DSSS) and phase shift keying (PSK) data modulation are employed to the PWM of the SMPS, so that it has reduced switching harmonics and the input and output power line voltage ripples contain data. A data demodulation algorithm has been developed for receivers, and code division multiple access (CDMA) concept is employed as communication method for a system with multiple SMPSs. The proposed method has been implemented in both Buck and Boost converters. The experimental results validated the proposed DSSS based PWM strategy for both harmonic reduction and communication.
Original languageEnglish
Pages (from-to)4455-4465
Number of pages11
JournalIEEE Transactions on Power Electronics
Issue number6
Early online date1 Aug 2016
Publication statusPublished - Jun 2017

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  • SMPS
  • DSSS
  • PWM
  • harmonic reduction
  • communication


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