Advanced digital signal processing techniques for compensation of nonlinear distortion in wideband multicarrier radio receivers

• Published in: IEEE transactions on microwave theory and techniques 2006-06, Vol.54 (6), p.2356-2366
• Main Authors: Valkama, M., Shahed hagh ghadam, A., Anttila, L., Renfors, M.
• Format: Article
• Language: English
• Subjects: Adaptive filters; Analog-digital conversion; Applied sciences; Circuit properties; communication system nonlinearities; Compensation; Costs; Design. Technologies. Operation analysis. Testing; digital radios; Digital signal processing; Digital signal processors; Distortion; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; Frequency filters; harmonic and intermodulation distortion; Integrated circuits; Integrated circuits by function (including memories and processors); Interference cancellation; Intermodulation distortion; Nonlinear distortion; Nonlinearity; Radio receivers; Radiocommunications; Receivers; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Signal processing; System performance; Telecommunications; Telecommunications and information theory; Transmitters. Receivers; Wideband
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/TMTT.2006.875274

One of the main trends in the evolution of radio receivers and other wireless device is to implement more and more of the receiver functionalities using digital signal processing (DSP). However, due to practical limitations in the analog-to-digital conversion process, some analog signal processing stages are likely to remain also in the continuation. With the ever-increasing demands for the system performance and supported data rates on one side, and the terminal flexibility and implementation costs on the other, the requirements for these remaining analog front-end stages become extremely challenging to meet. Then, one interesting idea in this context is to apply sophisticated DSP-based techniques to compensate for some of the most fundamental nonidealities of the receiver analog front-ends. In this paper, we focus on developing and demonstrating novel digital techniques to mitigate the effects of harmonic and intermodulation distortion in wideband multicarrier or multichannel receivers using adaptive interference cancellation. The approach in general is practically oriented and largely based on analyzing and processing measured real-world receiver front-end signals. The obtained results indicate that the proposed compensation technique can be used to suppress nonlinear distortion due to receiver front-end sections under realistic signaling assumptions