Distortion cancellation by polyphase multipath circuits
نویسندگان
چکیده
منابع مشابه
Spectral Purity Enhancement via Polyphase Multipath Circuits
The central question of this paper is: can we enhance the spectral purity of nonlinear circuits by using polyphase multipath circuits? The basic idea behind polyphase multipath circuits is to split the nonlinear circuits into two or more paths and exploit phase differences between these paths to cancel undesired distortion products. It turns out that it is very well possible to use polyphase mu...
متن کاملPolyphase Multipath Circuits for Cognitive Radio and Flexible Multi- Phase Clock Generation
In this chapter we discuss flexible cognitive radio circuits for dynamic access of unused spectrum. Ideally, such circuits can work at an arbitrary radio frequency (RF). We review techniques to realize radios without resorting to frequency selective dedicated filters [24], in particular a recently proposed polyphase multipath technique canceling harmonics and sidebands [11,12]. Using this techn...
متن کاملDistortion Optimized Multipath Video Streaming
This paper addresses the problem of choosing the best streaming policy for distortion optimal multipath video delivery, under delay constraints. The streaming policy consists in a joint selection of the video packets to be transmitted, as well as their sending time, and the transmission path. A simple streaming model is introduced, which takes into account the video packet importance, and the d...
متن کاملPolyphase IIR filter banks for subband adaptive echo cancellation applications
Polyphase IIR structures are known to be very attractive for very high performance filters that can be designed using very few coefficients. This combined with their reduced sensitivity to coefficient quantization in comparison to standard FIR and IIR structures makes them very applicable to very fast filtering especially when implemented in fixed point arithmetic. In this paper we suggest repl...
متن کاملPolyphase allpass IIR structures for sub-band acoustic echo cancellation
The advantages and current limitations of sub-band approaches to echo cancellation are reviewed. Polyphase allpass IIR halfband decimators and interpolators are presented. Their performance is compared to QMF structures in NLMS sub-band echo cancellation for hands-free telephone signals recorded in a car. The polyphase allpass IIR case is shown to give around 2 dB more ERLE with one fifth of th...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Transactions on Circuits and Systems I: Regular Papers
سال: 2005
ISSN: 1057-7122
DOI: 10.1109/tcsi.2005.852020