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Split sr-rls for the joint initialization of the per-tone equalizers and per-tone echo cancelers in dmt-based receivers (2004).
| Content Provider | CiteSeerX |
|---|---|
| Author | Ysebaert, Geert Vanbleu, Koen Cuypers, Gert Moonen, Marc |
| Description | This content is published in/by EURASIP JOURNAL ON APPLIED SIGNAL PROCESSING 2004:10, 1433–1445 |
| Abstract | 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 the mean and an upper bound for the step size is given. Moreover, we will indicate how the presented initialization method can be reused in several other ADSL applications. |
| File Format | |
| Publisher Date | 2004-01-01 |
| Access Restriction | Open |
| Subject Keyword | Per-tone Echo Cancelers Per-tone Equalizer Dmt-based Receiver Split Sr-rls Joint Initialization Transmission Direction Available Bandwidth Convergence Rate Performance Analysis Presented Initialization Method Square Root Recursive Least Square Efficient Bidirectional Communication Intersymbol Interference Signal-to-noise Ratio Efficient Algorithm Full Sr-rls Echo Canceler Tap Step Size Method Converges Downstream Channel Computational Complexity Initialization Scheme Memory Requirement Twisted Pair Several Adsl Application Joint Pteq Ptec Receiver Structure Achievable Bit Rate Echo Cancellation Asymmetric Digital Subscriber Line Upper Bound |
| Content Type | Text |
