Browsing by Subject "Serial concatenation"

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    Multi-input multi-output deletion channel
    (Institute of Electrical and Electronics Engineers, 2012) Wang F.; Duman, T. M.
    We describe a new channel model suitable in certain applications, namely the multi-input multi-output (MIMO) deletion channel. This channel models the scenarios where multiple transmitters and receivers suffering from synchronization errors are employed. We then consider a coding scheme over such channels based on a serial concatenation of a low-density parity check (LDPC) code, a marker code and a layered space-time code. We design two detectors operating at the bit level which jointly achieve synchronization for the deletion channel (with the help of the marker code) and detection for the MIMO channel. Utilizing the proposed detector together with an LDPC code with powerful error-correction capabilities, we demonstrate that reliable transmission over a MIMO deletion channel is feasible.
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    ItemOpen Access
    Serially concatenated polar codes
    (Institute of Electrical and Electronics Engineers, 2018) Arikan, E.
    Simulation results show that the performance of polar codes is improved vastly by using polar codes as inner codes in serially concatenated coding schemes. Furthermore, this performance improvement is achieved using a relatively short cyclic redundancy check as the outer code and a practically implementable successive cancellation list decoder for decoding the overall code. This paper offers a theoretical analysis of such schemes by employing a random-coding method on the selection of the outer code and assuming that the channel is memoryless. It is shown that the probability of error for the concatenated coding scheme decreases exponentially in the code block length at any fixed rate below the symmetric capacity. Applications of this result include the design of polar codes for communication systems that require high reliability at small to moderate code lengths, such as control channels in wireless systems and machine-type communications for industrial automation.