A Robust Mixed-Signal Cancellation Approach for Even-Order Intermodulation Distortions in LTE-A/5G-Transceivers
| Autor: | Mario Huemer, Christian Motz, Silvester Sadjina, Thomas Paireder |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Computer science
020208 electrical & electronic engineering Transmitter Bandwidth (signal processing) 020206 networking & telecommunications 02 engineering and technology Signal Single antenna interference cancellation Interference (communication) 0202 electrical engineering electronic engineering information engineering Electronic engineering Baseband Electrical and Electronic Engineering Transceiver Intermodulation |
| Zdroj: | IEEE Transactions on Circuits and Systems II: Express Briefs. 68:923-927 |
| ISSN: | 1558-3791 1549-7747 |
| Popis: | State-of-the-art radio frequency receivers for mobile communications inevitably show nonlinearities, mainly caused by constraints in the analog design of the low-noise amplifier and the mixer. In the widely-used direct-conversion architecture, especially even-order intermodulation products cause interference in the baseband, thereby severely deteriorating the receiver signal-to-noise ratio. While several proposed methods aim to cancel second-order distortions caused by transmitter self-interference, the mitigation of higher-order effects is rarely covered. In this brief, we present a novel scalable mixed-signal approach for cancellation of intermodulation distortions up to the sixth order. The interference signal is captured by means of an auxiliary receiver, which also allows to suppress interferences caused by external sources. The auxiliary receive signal serves as a basis for a real-time capable digital processing chain, which replicates and cancels the interference. The effectiveness of the proposed method has been verified using measurement data from real-world scenarios. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|