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Table 2 Important notation and acronyms

From: Cognitive radio frequency assignment with interference weighting and categorization

Notation Description
G c =(V c,E co,E adj) Conflict graph with vertices V c and edges E co,E adj
F={1,..,M} Set of M available frequencies
B v List of blocked frequencies at CRv due to PU
  hard constraints
W co={wvi vjco}[0,1] Set of co-channel continuous interference
  weight coefficients
W adj={wvi vjadj}[0,1] Set of adjacent channel continuous
  interference weight coefficients
N PU,N SU Number of primary and secondary users
hPUiPUi hPUiSUk Channel coefficients between PU Tx i , SU Tx k ,
  and PU Rx i
hSUlSUk hSUlPUj Channel coefficients between SU Tx k , PU Tx j ,
  and SU Rx l
P Rx_SUl_D,P Rx_SUl_I Desired received signal strength and interfering
  received signal strength at the l t h SU
\(P_{\text {Tx}\_\text {PU}m^{\prime }}, P_{\text {Tx}\_\text {SU}l^{\prime }}\phantom {\dot {i}\!}\) Transmitting power at m th PU and l th SU
S vi Saturation metrics label
Colvi Vertex coloring argument
Acronyms Description
CR Cognitive radio
FA Frequency assignment
PU, SU Primary user, secondary user
Tx, Rx Transmitter, receiver
QoS Quality of service
CminSumInt Centralized minimum cumulative network
  interference FA algorithm
CMaxSumCap Centralized interference sensitive maximum
  throughput FA algorithm
DminInt Distributed minimum interference FA algorithm
DMaxCap Distributed interference sensitive maximum
  throughput FA algorithm