Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Split SR-RLS for the Joint Initialization of the Per-Tone Equalizers and Per-Tone Echo Cancelers in DMT-Based Receivers | EURASIP Journal on Applied Signal Processing 2004 10 1433-1445 2004 Hindawi Publishing Corporation Split SR-RLS for the Joint Initialization of the Per-Tone Equalizers and Per-Tone Echo Cancelers in DMT-Based Receivers Geert Ysebaert ESAT-SCD Katholieke Universiteit Leuven Kasteelpark Arenberg 10 3001 Leuven-Heverlee Belgium Email Koen Vanbleu ESAT-SCD Katholieke Universiteit Leuven Kasteelpark Arenberg 10 3001 Leuven-Heverlee Belgium Email Gert Cuypers ESAT-SCD Katholieke Universiteit Leuven Kasteelpark Arenberg 10 3001 Leuven-Heverlee Belgium Email Marc Moonen ESAT-SCD Katholieke Universiteit Leuven Kasteelpark Arenberg 10 3001 Leuven-Heverlee Belgium Email Received 6 March 2003 Revised 25 August 2003 In asymmetric digital subscriber lines ADSL the available bandwidth is divided in subcarriers or tones which are assigned to the upstream and or downstream transmission direction. To allow efficient bidirectional communication over one twisted pair echo cancellation is required to separate upstream and downstream channels. In addition intersymbol interference and intercarrier interference have to be reduced by means of equalization. In this paper a computationally efficient algorithm for adaptively initializing the per-tone equalizers PTEQ and per-tone echo cancelers PTEC is presented. For a given number of equalizer and echo canceler taps per-tone it was shown that the joint PTEQ PTEC receiver structure is able to maximize the signal-to-noise ratio SNR on each subcarrier and hence also the achievable bit rate. The proposed initialization scheme is based on a modification of the square root recursive least squares SR-RLS algorithm to reduce computational complexity and memory requirement compared to full SR-RLS while keeping the convergence rate acceptably fast. Our performance analysis will show that the proposed method converges in .
