scholarly journals Enhanced overloaded code division multiple access for network on chip

Author(s):  
Behnam Vakili ◽  
Morteza Gholipour

Network on chip is used to implement the communication features on a Silicon chip. To increase the performance of Code Division Multiple Access (CDMA) Network On Chip (NOC) ,a Standard-basis (SB) Method is Proposed.In this Method, a source code from various transmitters are encoded separately using an orthogonal code . These coded data are Combined together by an Exclusive-OR operation and it is then sent to their destinations through the communication interface.By Performing AND operartion between original coded data and their Orthogonal code, chip sequence can be obtained. The Standard basis (SB) encoding and decoding technique is compared with the Walsh Based (WB) code in terms of power, area and throughput and the Proposed Standard basis encoding and decoding technique is proven to be more efficient.


VLSI Design ◽  
2007 ◽  
Vol 2007 ◽  
pp. 1-14 ◽  
Author(s):  
Xin Wang ◽  
Jari Nurmi

Two network-on-chip (NoC) designs are examined and compared in this paper. One design applies a bidirectional ring connection scheme, while the other design applies a code-division multiple-access (CDMA) connection scheme. Both of the designs apply globally asynchronous locally synchronous (GALS) scheme in order to deal with the issue of transferring data in a multiple-clock-domain environment of an on-chip system. The two NoC designs are compared with each other by their network structures, data transfer principles, network node structures, and their asynchronous designs. Both the synchronous and the asynchronous designs of the two on-chip networks are realized using a hardware-description language (HDL) in order to make the entire designs suit the commonly used synchronous design tools and flow. The performance estimation and comparison of the two NoC designs which are based on the HDL realizations are addressed. By comparing the two NoC designs, the advantages and disadvantages of applying direct connection and CDMA connection schemes in an on-chip communication network are discussed.


2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Fan Xu ◽  
Yuan-Qing Wang ◽  
Xiao-Fei Zhang ◽  
Cai-Yun Wang

A Correction to this paper has been published: https://doi.org/10.1038/s42005-021-00520-8.


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