Design and Performance Analysis of an Adaptive Receiver for Multicarrier DS-CDMA

Performance Comparison of Adaptive filtering Algorithms for Parallel Interference Cancellation in Asynchronous MC DS-CDMA Systems

“…L is the number of resolvable paths for single carrier case, then each sub-carrier undergoes a single path fading channel. With this assumption, the complex channel gain for the subcarrier (i, j) and k th user can be defined as [6].…”

“…Assuming that there are K asynchronous users in the MC DS-CDMA system, where all of them use the same pM U  subcarriers, the average power received from each user at the base station is also assumed to be the same, implying perfect power control. When the transmitted signal is in the form of (1), the received signal at the base station can be expressed as [6], is the reference user. The correlation receiver block diagram of the reference user is shown in Fig.…”

“…PIC is classified into two groups namely, Soft Decision PIC (SD PIC), and Hard Decision PIC (HD PIC), under assumption of perfect channel estimation the HD PIC outperforms the SD PIC. For further performance improvement of PIC system, adaptive PIC (APIC) scheme has been proposed for DS-CDMA system [5], and for MC-DS-CDMA system [6]. In each stage of the APIC receiver, MAI estimates are obtained using the bit estimates from the previous stage and the adaptive weights for the bit estimates.…”

Low Complexity Selective Adaptive Multicarrier DS-CDMA Receiver

“…One of the most promising schemes is the APIC scheme which was introduced for MC DS-CDMA in [16]. The major drawback of this system is its complexity, since weights are needed to be calculated for all sub-carriers and users of the system.…”

Performance Analysis of an Anti-Jamming Multicarrier System with Joint Time-Frequency Spreading

“…In the context of the multicarrier spreading spectrum techniques, there are mainly two types of schemes. One spreads the data stream in the time domain, such as the multicarrier (MC-) DS-CDMA scheme [2]- [4], while the other spreads in the frequency domain, such as the MC-CDMA scheme [5]- [7]. The two schemes can achieve the time and frequency domain diversity gain, respectively.…”