Medium Access Control (MAC) and Physical Layer (PHY) - CISE

4-June-07 P1901_PRO_016_r0
3.9 CARRIER FREQUENCY
The complex baseband digital signal is converted to analog signal and IQ modulated. I(t) and Q(t) are the inphase
and quadrature analog signals corresponding to the real and imaginary components of the complex
baseband signal respectively. The actual transmitted signal is related to them by the following relation:
( t)
= I(
t)
cos( 2πf
t)
− Q(
t)
sin( 2πf
t)
rTX c
c
Equation 31
f c denotes the carrier centre frequency, which must be a multiple of 156.25 KHz.
3.10 COMMUNICATION MODES
f
Transmission modes can be defined by specifying a carrier frequency ( c ), and symbol Type (I, II or III) and,
optionally, a power mask. Any two nodes that use a common communication mode shall be able to
communicate.
The carrier frequency shall be higher than the bandwidth of the baseband signal in negative frequencies in order
to avoid ICI and shall place the signal bandwidth in frequencies up to 100 MHz.
3.11 PHY PARAMETER SPECIFICATION
Table 9 contains the values for the PHY parameters.
Parameter Value Description
INTER PPDU SPACE 1 189 μs See 3.2 and 4.1
INTER PPDU SPACE 2 126 μs See 3.2 and 4.1
Table 9 PHY parameter specification
Submission page 65 UPA-OPERA