Transmission efficiency of spread ALOHA system using unified spread-spectrum code

Fumihito Sasamori*, Fumio Takahata

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review


    This paper considers the direct-spread ALOHA system using the same spread-spectrum code where the individual packet signals are separated using the time compression of the output signal from the matched filter in the demodulator. A method is shown to derive theoretically the transmission efficiency of the system and then the performance of the spread ALOHA system of the spread code length of seven chips is shown as an example. The transmission efficiency (channel traffic performance and the throughput) of the system is compared to that of the conventional slotted ALOHA system and discussed quantitatively. It is shown that the spread ALOHA system can realize a good performance with a low peak transmitted power.

    Original languageEnglish
    Pages (from-to)107-114
    Number of pages8
    JournalElectronics and Communications in Japan, Part I: Communications (English translation of Denshi Tsushin Gakkai Ronbunshi)
    Issue number1
    Publication statusPublished - 1996 Jan


    • Channel traffic
    • Matched filter
    • Slotted ALOHA
    • Spread ALOHA
    • Spread-spectrum code
    • Throughput

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Electrical and Electronic Engineering


    Dive into the research topics of 'Transmission efficiency of spread ALOHA system using unified spread-spectrum code'. Together they form a unique fingerprint.

    Cite this