Spread Spectrum (SPSP) Communication is the theoretical basis of Direct Sequence Spread Spectrum (DSSS) transceiver technology. Spreading code, modulation, demodulation, carrier synchronization and code synchronization in SPSP communications are the core parts of DSSS transceivers. This paper focuses on the code synchronization problem in SPSP communications. A novel code synchronization algori...

We consider the problem of training-based code-timing estimation for the asynchronous direct-sequence code-division multipleaccess (DS-CDMA) system. We propose a modified large-sample maximum-likelihood (MLSML) estimator that can be used for the code-timing estimation for the DS-CDMA systems over the resolvable multipath channels in closed form. Simulation results show that MLSML can be used to...

A vast majority of L1 vocabulary acquisition occurs through incidental learning during reading (Nation, 2001; Schmitt et al., 2001). We propose a probabilistic approach to generating code-mixed text as an L2 technique for increasing retention in adult lexical learning through reading. Our model that takes as input a bilingual dictionary and an English text, and generates a code-switched text th...

Software developers sometimes rewrite large sections of program code. Reducing the number of rewrites would save valuable development time. Ripple Down Rules (RDR) has a proven knowledge acquisition track record. RDR looks to offer a simple to maintain method capturing knowledge gained through experience. RDR allows recommendations identified when a failure occurs, to be captured and reused. Th...

L2C is the second civilian signal introduced on the modernized block of Global Positioning System (GPS) satellites. The two PN sequences employed in L2C, named CM and CL, have periods of 20 milliseconds and 1.5 seconds respectively. With longer PN codes, the search space for L2C acquisition becomes huge. In this paper, the Generalized Post Detection Integration (GPDI) technique is introduced to...

A programmable pipelined digital differential matched filter (PDMF) implemented for a direct sequence spread spectrum receiver is proposed in this paper. To reduce the power consumption, the architecture PDMF is based on the synchronization combined PN code phase acquisition algorithm (Huang et al., 1999). Compared with the conventional PN code phase acquisition algorithm, the theoretical analy...