LG VX8500 Service Manual page 123

VX8500
assignment. See also Forward CDMA Channel and Reverse CDMA Channel.
CDMA Channel Number. An 11-bit number corresponding to the center of the CDMA frequency assignment.
CDMA Frequency Assignment. A 1.23MHz segment of spectrum centered on one of the 30KHz channels of
the existing analog system.
Code Channel. A subchannel of a Forward CDMA Channels. A Forward CDMA Channel contains 64 code
channels. Code channel zero is assigned to the Pilot Channel. Code channels 1 through 7 may be assigned to the
either Paging Channels or the Traffic Channels. Code Channel 32 may be assigned to either a Sync Channel or a
Traffic Channel. The remaining code channels may be assigned to Traffic Channels.
Code Division Multiple Access (CDMA).
A technique for spread-spectrum multiple-access digital
communications that creates channels through the use of unique code sequences.
Code Symbol. The output of an error-correcting encoder. Information bits are input to the encoder and code
symbols are output from the encoder. See Convolutional Code.
Continuous Transmission. A mode of operation in which Discontinuous Transmission is not permitted.
Control Mobile Attenuation Code(CMAC). A 3-bit field in the Control-Filler Message that specifies the
maximum authorized power level for a mobile transmitting on an analog reverse control channels.
Convolution Code. A type of error-correcting code. A code symbol can be considered as the convolution of
the input data sequence with the impulse response of a generator function.
CRC. See Cyclic Redundancy Code.
Cyclic Redundancy Code (CRC). A class of linear error detecting codes which generate parity check bits by
finding the remainder of a polynomial division.
Data Burst Randomizer. The function that determines which power control groups within a frame are
transmitted on the Reverse Traffic Channel when the data rate is lower than 9600 bps. The data burst randomizer
determines, for each mobile station, the pseudo random position of the transmitted power control groups in the
frame while guaranteeing that every modulation symbol is transmitted exactly once.
DBc. The ratio(in dB) of the sideband power of a signal, measured in a given bandwidth at a given frequency
offset from the center frequency of the same signal, to the total inband power of the signal. For CDMA, the total
inband power of the signal is measured in a 1.23MHz bandwidth around the center frequency of the CDMA
signal.
DBm. A measure of power expressed in terms of its ration (in dB) to one milliwatt.
DBm/Hz. A measure of power spectral density. DBm/Hz is the power in one Hertz of bandwidth. Where
power is expressed in units of dBm.
DBW. A measure of power expressed in terns of its ration (in dB) to one Watt.
Dedicated Control Channel. An analog conrtol channel used for the transmisson of digital control information
from either a base station or a mobile station.
Deinterleaving. The process of unpermuting the symbols that were permuted by the interleaver..
Deinterleavering is performed on reveived symbols prior to decoding.
Digital Color Code(DCC). A digital signal transmitted by a base station on a forward analog control channel
that is used to detect capture of a base station by an interfering mobile station.
Dim-and-Burst. A frame in which primary traffic is multiplexed with either secondary traffic or signaling
traffic.
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