Reliable signal acquisition with low computational complexity is an important design objective for the evolution of global navigation satellite systems (GNSS). Most GNSS signals consist long pseudorandom noise (PRN) codes whose expensive in terms memory, computation time, and energy. As these resources are particularly scarce emerging mass-market user segment, cyclostationary pilot short PRN ...

This paper presents a new procedure of partial deduction of various constraint logic programs. The procedure takes a program-goal pair (P0, Q0) as input and outputs a resultant program-goal pair (Pn, Qn). The procedure always terminates and the computational equivalence of the program-goal pairs (P0, Q0) and (Pn, Qn) is preserved. Pn is more efficient in solving Qn than P0 in solving Q0. Our pr...

Direct Sequence Code Division Multiple Access (DS-CDMA) system is well known wireless technology. This system suffers from MAI (Multiple Access Interference) caused by Direct Sequence users. Multi-User Detection schemes were introduced to detect the users’ data in presence of MAI. Linear Multi-user Detectors and conventional Matched Filter (MF) are simulated using gold, PN and even kasami seque...

Direct Sequence Code Division Multiple Access (DS-CDMA) system is well known wireless technology. This system suffers from MAI (Multiple Access Interference) caused by Direct Sequence users. Multi-User Detection schemes were introduced to detect the users’ data in presence of MAI. Linear Multi-user Detectors and conventional Matched Filter (MF) are simulated using PN and even kasami sequences a...

In this paper, we present a code-division multiple access (CDMA) system with a spreading factor of N that can accommodate up to mN users, where m 2. The m sets of orthogonal spreading sequences are constructed by overlaying the same N orthogonal Walsh-Hadamard sequences with a set-specific pseudonoise (PN) sequence. Interference between user signals from different sets is cancelled by means of ...

Recently, there is a need for fostering the critical reflective side of L2 teacher education. This study investigated the implications of personal narrative (PN) and reflective journal (RJ) writing for Iranian EFL teachers’ reflective writing. Sixty (36 women and 24 men) in-service secondary school EFL teachers were selected based on the convenience sampling from Iran. L2 teachers equally divid...

Let m, e be positive integers, p a prime number, Fpm be a finite field of p elements and R = Fpm [u]/〈u 〉 which is a finite chain ring. For any ω ∈ R and positive integers k, n satisfying gcd(p, n) = 1, we prove that any (1+ωu)-constacyclic code of length pn over R is monomially equivalent to a matrix-product code of a nested sequence of p cyclic codes with length n over R and a p × p matrix Ap...