Changes between Version 2 and Version 3 of IEEE2010_Drexel


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Timestamp:
Apr 22, 2011, 1:23:33 PM (11 years ago)
Author:
jdavis
Comment:

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  • IEEE2010_Drexel

    v2 v3  
    99wireless channel is assumed to be flat fading and constant over the duration of one time slot. A user i
    1010with a non-empty queue transmits a packet with some probability p in the beginning of each time slot,
    11 after waiting for a random time interval
    12 i. If more than two users transmit in the same slot, the collision
     11after waiting for a random time interval.  If more than two users transmit in the same slot, the collision
    1312cannot be resolved, the packets are discarded and the users are asked to retransmit at a later time. If only
    1413one user transmits, the transmitted packet is recovered with some probability, depending on the state
    1514of the channel. If two users transmit, the collision can be separated and the packets recovered by first
    1615oversampling the collision signal and then exploiting independent information about the two users that
    17 is contained in the signal polyphase components. The properties of the user delays
    18 i’s are determined
     16is contained in the signal polyphase components. The properties of the user delays i’s are determined
    1917so that the probability of user separation is maximized. The ALOHA-CR throughput is derived under
    2018the infinite backlog assumption, i.e., the network users always have data in their queues, and also under