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- W2095679044 abstract "Adaptive distributed-arithmetic echo cancellers are well suited for full-duplex high-speed data transmission. They allow a simpler implementation than adaptive linear transversal filters, since multiplications are replaced by table look-up and shift-and-add operations. Various tradeoffs between the number of operations and the number of memory locations of the look-up tables can be achieved by segmenting the echo canceller delay line into sections of shorter length. Adaptivity is achieved by a decision-directed stochastic gradient algorithm to adjust the contents of the look-up tables. The author adopts the mean-square error criterion to investigate the convergence behavior of adaptive distributed-arithmetic echo cancellers. Under the assumption that the look-up values are statistically independent of the symbols stored in the echo canceller delay line, he obtains an analytical expression for the mean-square error as a function of time. The maximum speed of convergence and the corresponding optimum adaptation gain are also determined. Simulation results for a full-duplex quaternary partial response class-IV system are presented and compared with theoretical results. >" @default.
- W2095679044 created "2016-06-24" @default.
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- W2095679044 date "2005-08-24" @default.
- W2095679044 modified "2023-09-25" @default.
- W2095679044 title "Analysis Of The Convergence Behavior Of Adaptive Distributed-arithmetic Echo Cancellers" @default.
- W2095679044 doi "https://doi.org/10.1109/isit.1991.695090" @default.
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