Analisis Throughput Multicarrier CDMA Slotted Aloha  

Oleh:

Sari, Lydia

Jenis: Article from Journal - ilmiah nasional - tidak terakreditasi DIKTI - atma jaya
Dalam koleksi: Metris: Jurnal Mesin, Elektro, Industri dan Sains vol. 6 no. 1 (Mar. 2005), page 31-38.
Topik: cdma; multicarrier CDMA; slotted aloha; throughput
Fulltext: hal 31-38.pdf (266.84KB)

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Perpustakaan Pusat (Semanggi) Nomor Panggil: MM42 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada

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This research proposes an integrated system consisting of multicarrier code-division multiple-access (Multicarrier CDMA) with slotted aloha (S-Aloha) scheme, named multicarrier CDMA S-Aloha. The performance analysis of this system is stated as throughput. In multi carrier CDMA S-Aloha the initial data is serial to parallel converted to a number of lower rate data streams. Each stream which consists of a part of the initial data called sub-packet will be then direct sequence spread-spectrum modulated using specific spreading code for each user, and all the DS-SS signals are transmitted in parallel on different subcarriers. This data transmission is done in a pre-determined time-slot, in accordance to the slotted Aloha scheme. results show that the system has better throughput for high bit rate signal transmission, compared to the formerly published Multicarrier CDMA Pure Aloha scheme. It is also shown that the throughput of the system improves as the number of subcarriers and the length of single-carrier code increase, while the increase of subpacket legth degrades the throughput of the system albeit still put performs the Multicarrier CDMA Pure Aloha scheme.

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