Novel Two-Bit Adaptive Delta Modulation Algorithms
نویسندگان
چکیده
منابع مشابه
Adaptive Sigma–Delta Modulation With One-Bit Quantization
A method for improving the signal-to-noise ratio (SNR) of sigma–delta modulators with one-bit quantization is presented. The two-level feedback signal of a standard sigma–delta modulator is replaced by a multilevel signal, which is a superposition of two parts. One part ( ) represents a rough estimate of the instantaneous amplitude of the input signal (prediction signal), and the other ( ) is t...
متن کاملA 2-bit Adaptive Delta Modulation System with Improved Performance
A 2-bit adaptive delta modulation system with improved performance is proposed in this paper. Its main characteristic is a new adaptation algorithm that incorporates both memory and look-ahead instantaneous step-size estimation and leads the modulator into generating a 2-bit output codeword. As shown by computer simulation results, the proposed system offers reduced overshoot and fast response ...
متن کاملAdaptive bit-interleaved coded modulation
Adaptive coded modulation is a powerful method for achieving a high spectral efficiency over fading channels. Recently proposed adaptive schemes have employed set-partitioned trelliscoded modulation (TCM) and have adapted the number of uncoded bits on a given symbol based on the corresponding channel estimate. However, these adaptive TCM schemes will not perform well in systems where channel es...
متن کاملDescription of a 2-Bit Adaptive Sigma-Delta Modulation System with Minimized Idle Tones
A 2-bit adaptive sigma delta modulation system that inherently eliminates the idle tones present in conventional and other adaptive sigma delta systems is described. The system incorporates both memory and look-ahead instantaneous step-size estimations and, as shown by computer simulation results apart from eliminating the unwanted idle tones despite dithering, it offers improved SNR performanc...
متن کاملAdaptive Bit-Interleaved Coded Irregular Modulation
We consider a simple method to improve the adaptiveness and flexibility of bit-interleaved coded modulation (BICM) for various channel models. With state-of-the art adaptive transmission techniques, the raw adaptation of the data rate to the channel characteristics is usually done by selecting an appropriate signal constellation and the fine adaptation is done by changing the code rate. To enab...
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: Informatica
سال: 2019
ISSN: 0868-4952,1822-8844
DOI: 10.15388/informatica.2019.200