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Table 1 List of the notations used throughout this article

From: Joint resource allocations for remote radio head deployments with coherent transmitter

Notations

Explanation

M

The total RRH port number

K

The total user number

N

The total subcarrier number

W

The system bandwidth

m, n, k

The index of RRH port, subcarrier and user, respectively

l k [m, n]

The large-scale channel fading

h k [m, n]

The channel impulse response

ρ k [n]

The subcarrier assignment indicator

k [ n ]

A set of RRH ports for the transmission of a subcarrier

P T

The total system power

P

The power limit of each RRH port

y k [n]

The receiving signal

x k [n]

The unitary transmitted symbol

z k [n]

The additive Gaussian noise

N 0

The noise power

ω k [n]

The transmit weight vector

γ k [n]

The receiving SNR

G k [m, n]

The combined channel gain

C k [n]

The spectrum efficiency

( )

The Lagrangian function

g()

The Lagrangian dual function

α, β, λ

The Lagrangian multipliers

Δα, Δβ, Δλ

The sub-gradients of Lagrangian multipliers

J ( )

The dual decomposition function

η

The energy efficiency

μ k [n]

The power-scaling coefficient