With the combining vector, the CQI can be represented as the product of an equally allocated power ρ and a norm of effective channel | | h ̄ k, a eff | | 2 since there is no CDI quantization error when N = M.
For a nonrelayed carrier, and a total allocated power (over the two instants), the rate evolves as (21).
It is worth noting that, although the capacity-achievable power allocation for MIMO SVD is water-filling [6], exact analysis of such allocation strategy is very difficult (in water-filling, each allocated power is a function of all eigenvalues, leading to an intractable SER expression of each subchannel [18], Ft. 1).
Given a sub-channel, the allocated power is not transferable, i.e., the power cannot be shared among small cells in an arbitrary ratio.
When the eavesdropping probability is low, since the source 2 is the nearest to the eavesdropper, the SSRO will allocate major jammer power to the source 2. When the eavesdropping probability is high, to keep the sum-security-rate optimal, the SSRO scheme will allocate more jammer power for other two sources than before, resulting a higher JFI of allocated power.
Figure 5 An Example of the SUs allocated power using PI-Algorithm.
In the second step, we can decide the amount of allocated power to each stream without a bisection search.
(ii) Obtain total allocated power for each user,.
It also indicates that decreasing allocated power may improve EE.
In Figure 2, we consider the allocated power over iterations.
