Overlapped time domain multiplexing (OvTDM) is a novel technique for utilizing inter-symbol interference (ISI) to benefit a communication system. We implement the OvTDM technique based on turbo structure and associate a turbo product code (TPC) to construct a novel coded turbo-structure OvTDM system. Two schemes of the iterative receiver and soft input and soft output (SISO) decoding algorithms...

The basic problem we consider is the following: suppose we know the probability of the next symbol in an alphabet, and the next symbol, give a compression algorithm for the string. The general idea is simple: allocate short codes to more probable symbols. This will in general, force longer codes to be allocated to less probable symbols. We hope that the expected length of the code produced will...

Off-centered, two-sided geometric distributions of the integers are often encountered in lossless image compression applications, as probabilistic models for prediction residuals. Based on a recent characterization of the family of optimal prefix codes for these distributions, which is an extension of the Golomb codes, we investigate adaptive strategies for their symbol-by-symbol prefix coding,...

We describe the effect of a particular form of “noise” in benchmarking. We investigate the source of anomalous measurement data in a series of optimization strategies that attempt to improve runtime performance in the garbage collector of a Java virtual machine. The results of our experiments can be explained in terms of the difference in code layout, and hence instruction and data cache behavi...

Library. Block sublibrary of Error Detection and Correction An (N,K) Reed-Solomon code can correct up to floor((N-K)/2) symbol errors (not bit errors) in each. Schifra Reed Solomon Error Correcting Library. Contribute to schifra Schifra C++ Reed-Solomon Error Correcting Code Library sch... ... ...ifra.com. An interactive demo of Reed-Solomon error correction coding. detail and allows the user t...

For an orthogonal frequency division multiplexing (OFDM) system, frame synchronization is achieved by forcing the receiver to start its FFT at the right time. One way in which this may be achieved is to precede the OFDM data with a special synchronization symbol. In this paper two synchronization symbols are proposed to achieve frame synchronization for an OFDM-based indoor wireless data transm...

|In this paper, the loss due to imperfect channel estimation is derived for pilot symbol assisted BPSK on fading channels with diversity. The presented approach, which holds for both narrowband and spread spectrum communication, further provides an analytical optimization of pilot symbol spacing. The loss due to channel estimation is demonstrated to be low if the maximum Doppler frequency is si...

In this paper, the problem of frame synchronization in orthogonal frequency division multiplexing (OFDM) system is considered. For an OFDM system, frame synchronization is achieved by forcing the receiver to start its FFT at the right time. One way in which this may be achieved is to precede the OFDM data with a special synchronization symbol. Two synchronization symbols are proposed to achieve...

A cyclic minimum variance detector is presented for the blind detection of the higher data rate signals in a multirate asynchronous Direct Sequence Code Division Multiple Access (DS-CDMA) system and which are signaled over a multipath Rayleigh fading channel. The interference viewed by a higher data rate symbol will be periodic in nature due to the presence of a lower data rate symbol, which sp...

The reverse link encoding steps of the IS95 cellular code-division multiple-access (CDMA) standard consist of convolutional encoding, block interleaving, and orthogonal Walsh function encoding. Deinterleaving individual symbol metrics obtained from the Walsh function matched filters followed by conventional Viterbi decoding produces suboptimal results, as unwanted intersymbol Walsh function cor...