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A Wideband Fully Integrated Software-Defined Transceiver for FDD and TDD Operation.
- Source :
- IEEE Journal of Solid-State Circuits; May2017, Vol. 52 Issue 5, p1274-1285, 12p
- Publication Year :
- 2017
-
Abstract
- Although there is much active research on software-defined radios (SDRs) with receive (RX) or transmit (TX) functionality, little work has been done on SDR transceivers supporting frequency division duplex (FDD). In this paper, we present a new circuit concept in which a distributed TX circuit cancels the transmitted signal at a reverse RX port through destructive interference while adding signal constructively at a forward TX port. We pair the distributed transmitter with a receiver-tracking PA degeneration technique to suppress the injected noise from TX circuits in the RX band. The system does not require off-chip filters or circulators, but still achieves both SDR flexibility and both FDD and time division duplex function. Measurements from the transceiver implemented in 65-nm CMOS show a frequency tuning range of 0.3–1.6 GHz with TX–RX isolation >23 dB and transmitted power up to 19 dBm. [ABSTRACT FROM AUTHOR]
- Subjects :
- SOFTWARE radio
DISTRIBUTED amplifiers
RADIO transmitter-receivers
Subjects
Details
- Language :
- English
- ISSN :
- 00189200
- Volume :
- 52
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Journal of Solid-State Circuits
- Publication Type :
- Academic Journal
- Accession number :
- 122661763
- Full Text :
- https://doi.org/10.1109/JSSC.2017.2650409