An SNR improvement of passive SAW tags with 5-bit Barker code sequence

作者：Bae Hyunchul; Kim Jaekwon; Burm Jinwook^*

来源：International Journal of Electronics, 2012, 99(7): 1005-1011.

DOI：10.1080/00207217.2011.651688

• communication systems
• measurements
• microwave
• modulation
• RF communication

Passive surface acoustic wave (SAW) tags require a large signal-to-noise ratio (SNR) in order to increase the interrogation range. For the purpose of achieving high SNR for radio frequency identification (RFID) communication systems, Barker codes, a binary phase shift keying (BPSK) modulation technique, have been adopted in this study. Passive SAW RFID tags were designed with 5-bit Barker code sequences to generate BPSK modulated signals. Through the SNR analysis, the improvements in SNR were about 11 dB using Barker codes along with a correlator, which can be further improved by optimisation in the correlator.

• 出版日期2012