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TUTCRIS

Digital predistortion for mitigating transmitter-induced receiver desensitization in carrier aggregation FDD transceivers

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
OtsikkoProceedings of IEEE Global Conference on Signal and Information Processing
JulkaisupaikkaWashington, DC
KustantajaIEEE
Sivut694-698
ISBN (elektroninen)978-1-5090-4544-0
DOI - pysyväislinkit
TilaJulkaistu - 7 joulukuuta 2016
OKM-julkaisutyyppiA4 Artikkeli konferenssijulkaisussa
TapahtumaIEEE GLOBAL CONFERENCE ON SIGNAL AND INFORMATION PROCESSING -
Kesto: 1 tammikuuta 1900 → …

Conference

ConferenceIEEE GLOBAL CONFERENCE ON SIGNAL AND INFORMATION PROCESSING
Ajanjakso1/01/00 → …

Tiivistelmä

In frequency division duplexing (FDD) transceivers, the intermodulation distortion (IMD) created by a nonlinear transmit power amplifier can easily interfere with the receiver (RX) band. This is a particular concern in various carrier aggregation scenarios, and can cause severe own RX desensitization. In this paper, a spur-injection based sub-band digital predistortion (DPD) solution is proposed to mitigate this problem. Compared to earlier works, the proposed DPD parameter learning is performed using the main RX of the device, and thus it does not require an extra observation RX, which implies reduced costs and size. The proposed DPD is tested using computer simulations with practical models for the transmitter (TX) power amplifier and the TX/RX duplexer filters. The TX-induced IMD is suppressed by up to 25 dB at the own RX band, demonstrating a significant improvement in the RX signal-to-interference-and-noise-ratio (SINR).