Redundant Residue Number System Assisted Multicarrier Direct-Sequence Code-Division Dynamic Multiple Access for Cognitive Radios


A redundant residue number system (RRNS)-assisted multicarrier direct-sequence code-division dynamic multiple-access (MC/DS-CDDMA) scheme is proposed for application in cognitive radios (CRs). Taking the advantages of both multicarrier direct-sequence code-division multiple access and RRNS, the RRNS MC/DS-CDDMA has a low complexity for implementation and a high flexibility for reconfiguration and is robust to dynamic spectrums. Associated with the RRNS MC/DS-CDDMA, in this paper, the so-called receiver multiuser diversity aided multistage minimum mean-square error multiuser detector (RMD/MS-MMSE MUD) is considered for signal detection. Specifically, three types of RMD/MS-MMSE MUDs are proposed: Type-I.1, Type-II.1, and Type-I.2 RMD/MS-MMSE MUDs. In these MUD schemes, the Type-I.1 MUD carries out the joint detection of all the subcarrier signals using both the observations and the channel state information (CSI) of all the subcarriers. In the Type-I.2 and Type-II.1 RMD/MS-MMSE MUDs, the embedded MMSE-MUDs are implemented subcarrier by subcarrier independently. Furthermore, in the Type-I.2 RMD/MS-MMSE MUD, the autocorrelation matrices used by the MMSE-MUDs are free from CSI. Explicitly, both Type-II.1 and Type-I.2 RMD/MS-MMSE MUDs are suitable for operation in dynamic spectrum environments. Furthermore, our simulation results show that the preceding three types of RMD/MS-MMSE MUDs are capable of making the RRNS MC/DS-CDDMA systems achieve similar error and throughput performance. Owing to the foregoing merits, the RRNS MC/DS-CDDMA employing either Type-I.2 or Type-II.1 RMD/MS-MMSE MUD may be considered one of the highly promising dynamic multiple-access schemes for application in CR systems.

Did you like this research project?

To get this research project Guidelines, Training and Code... Click Here

PROJECT TITLE :Dynamic, Fine-Grained Data Plane Monitoring With Monocle - 2018ABSTRACT:Ensuring network reliability is important for satisfying service-level objectives. However, diagnosing network anomalies during a timely fashion
PROJECT TITLE :Digit-Level Serial-In Parallel-Out Multiplier Using Redundant Representation for a Class of Finite Fields - 2017ABSTRACT:2 digit-level finite field multipliers in F 2 m using redundant illustration are presented.
PROJECT TITLE :Energy-Efficient VLSI Realization of Binary64 Division With Redundant Number Systems - 2017ABSTRACT:VLSI realizations of digit-recurrence binary division typically use redundant illustration of partial remainders
PROJECT TITLE :Control Strategy for Modular Multilevel Converters with Redundant Sub-modules Using Energy Reallocation - 2017ABSTRACT:By analyzing the topology and mathematical model of modular multilevel converters (MMCs), a
PROJECT TITLE : A Modified Partial Product Generator for Redundant Binary Multipliers - 2016 ABSTRACT: Because of its high modularity and carry-free addition, a redundant binary (RB) representation can be used when coming up

Ready to Complete Your Academic MTech Project Work In Affordable Price ?

Project Enquiry