Wireless coordinated multi-point technology is coordinated multi-point technology with wireless cooperation between adjacent mobile hubs.
System Model
Basic system model
For a base model, we consider a network with a mobile hub and a sensor node. Then, the received signal at the mobile hub is given by
(1)
where h is a received channel from a sensor node to a mobile hub, s is a transmission signal with a power constrain of and n is a noise signal.
Interference system model
If two mobile hubs use the same frequency band, the received signal at mobile hub 1 from two sensor nodes can be modelled as
where h_{1,1} and h_{1,2} are uplink channels from two sensor nodes to mobile hub 1, respectively, and s_1 and s_2 are transmission signals from sensor node 1 and 2, respectively. The received signal at mobile hub 2 can be written by the same approach used for the received signal at mobile hub 1.
Cooperative system model
Conventional Non-cooperative Decoding
Non-cooperative decoding for a basic system
In basic system of (1), we assume Rayleigh distribution for channel model of h with unit variance and complex Gaussian distribution with variance of for noise model of n. The ergodic capacity of the basic system system in (1) can be given by
(2)
Non-cooperative decoding for an interference system
Cooperative Decoding
Ideal cooperation
High-power cooperation
Simulation Results
The above figure shows the average capacity with respect to the different SNR values for a Gaussian channel case.
