name: 4PAM
full_form: 4 Pulse-Amplitude Modulation
context: in Fig.5.2.10.2(a), while the corresponding FBI decoding in the Node B is shown in Fig.5.2.10.2(b). Each sub-group has its own encoder/decoder. FBI encoding for sub-group s in the UE FBI decoding for sub-group s in the Node B Figure 5.2.10.2: ASTTD feedback quantization method. The FBI decoder for each sub-group consists of a delay-line buffer for storing a number of most recently received FBI bits, and the ratio regenerator. The ratio regenerator is a look-up table, shown in Table 5.2.10.1 for the FBI decoding length L=1. Once the power ratio is regenerated as Rs=Rsq, where Rsq=10Ratio(dB)/10, the weights ws1 and ws2 are calculated according to equation (1). Table 5.2.10.1 Mapping table for power ratio regenerator with FBI decoding length L=1 In the case of 4x2 and 4x4 MIMO configurations, there are two independent FBI bits that are transmitted from the UE, one for each sub-group of transmit antennas. Depending on the used DPCCH slot format, these two FBI bits can be transmitted
description: 4 Pulse-Amplitude Modulation (4PAM) is a digital modulation scheme used in telecommunications. It is specifically employed in S-E-DPDCHs (Secondary Enhanced Dedicated Physical Data Channels) within the UTRAN (UMTS Terrestrial Radio Access Network). 4PAM enables efficient data transmission over wireless channels by varying the amplitude of four distinct signal levels.
explanation: The text explicitly describes 4PAM as a 'digital modulation scheme' used for data transmission in a telecommunications network. Its application in S-E-DPDCHs and its role in enabling efficient data transfer further solidify its classification.
section_title: 4.8.4.1A	Determination of SF, modulation scheme and number of S-E-DPDCH PhCHs needed
biotag_Context: O,O,O,O,O,B-Miscellaneous,O,O,O,B-Network Function,I-Network Function,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,B-Device,B-Miscellaneous,O,O,O,O,O,O,B-Network Function,I-Network Function,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,B-Technology,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Connection,O,O,O,O,B-Miscellaneous,O,O,O,O
biotag_Description: B-Miscellaneous,I-Miscellaneous,I-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network,O,O,O,O,O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O