name: LI
full_form: Length Indicator
context: For the HSDPA study item, an AMC scheme using 7 MCS levels as outlined in Table-4 of the Annex were simulated using a symbol level link simulator. The AMC scheme uses QPSK, 8-PSK and 16 and 64 QAM modulation using R=1/2 and R=3/4 Turbo code and can support a maximum peak data rate of 10.8 Mbps. Figure 47 to Figure 49 shows some sample FER vs. Ior/Ioc curves for various MCS levels for a fixed power allocation of â1dB. It may be observed that as the order of MCS is increased the Ior/Ioc requirements gets higher to achieve the same FER. Figure 50 to Figure 52 shows the throughput performance of the AMC at 3 kmph and with Hybrid ARQ (Chase combining) enabled/disabled. Figure 53 to Figure 55 shows the performance of the AMC at 120 kmph and with Hybrid ARQ (Chase combining) enabled/disabled. The following abbreviations are used in the Figures: CE â Channel Estimation â 0(ideal), 1 (non-ideal) STTD â Transmit Diversity â 0(off), 1(on) NC â Number of codes ARQ â Hybrid ARQ using Chase
description: The Length Indicator (LI) is a parameter used in the calculation of parity bits for payload and frame headers/control frames. It determines the number of bits to be considered for CRC attachment and parity bit generation.
explanation: Based on the context, LI is classified as a Parameter because it is used as an input value in calculations related to error detection and correction (CRC attachment and parity bit generation) within the frame structure.
section_title: 7.1.1.1	Relation between input and output of the Cyclic Redundancy Check
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