A 7.5-GHz Frequency-Hopping CDMA UWB Transceiver for Secure Multi-Sensor Connectivity

This brief describes an ultra-wideband (UWB) transceiver architecture that employs a frequency-hopping code-division multiple-access (FH-CDMA) scheme for secure multi-sensor connectivity with up to 18-channel capacity. By using distinct frequency-hopping (FH) patterns based on m-sequence, quantitati...

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Veröffentlicht in:IEEE transactions on circuits and systems. II, Express briefs Jg. 72; H. 1; S. 163 - 167
Hauptverfasser: Lin, Luhua, Wang, Bowen, Rhee, Woogeun, Wang, Zhihua
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York IEEE 01.01.2025
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Channel capacity
Clock synchronization
Code Division Multiple Access
Code-division multiple-access (CDMA)
Communication system security
Frequency hopping
frequency-hopping (FH)
Multiaccess communication
Radio frequency
Receivers
secure
Symbols
Synchronization
transceiver
Transceivers
Transmitters
ultra-wideband (UWB)
Ultrawideband
Wireless communication
Wireless sensor networks
ISSN:1549-7747, 1558-3791
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Zusammenfassung:This brief describes an ultra-wideband (UWB) transceiver architecture that employs a frequency-hopping code-division multiple-access (FH-CDMA) scheme for secure multi-sensor connectivity with up to 18-channel capacity. By using distinct frequency-hopping (FH) patterns based on m-sequence, quantitative analysis and simulation results show that the FH-CDMA UWB system can support up to 18 users simultaneously sharing the same transmission band. The duty cycle control of a carrier signal for each FH cycle enables the transmitter to perform baseband clock synchronization with nano-second resolution. A prototype 7.5-GHz UWB transceiver is implemented in 65-nm CMOS. With the FH enabled, the transmitter meets the UWB spectrum mask. The receiver achieves a sensitivity of -91 dBm at 25 kb/s and exhibits <1-dB degradation when three users transmit signals simultaneously.
Bibliographie:ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 14
ISSN:1549-7747
1558-3791
DOI:10.1109/TCSII.2024.3503771