name: FOM
full_form: Figure of Merit
context: stop-and-wait protocol, where at maximum n HSDPA TTIs would be buffered at any given time. Thus, for n-channel stop-and-wait ARQ the L1 buffering can be expressed as: However, it must be noted that the size of HSDPA TTI may change when the number of subchannels changes, i.e. TTI length for n-channel SAW HARQ can be shorter than one for dual channel SAW HARQ. Average receiver buffer sizes for dual channel HARQ for some bit rates are depicted in Figure 27. Naturally, the number of subchannels in stop-and-wait ARQ is reflected in the amount of acknowledgment signaling needed to be sent to the transmitter. The complexity impact on RNS is mainly concentrated on Node B where the H-ARQ retransmission resides according to the current proposal. However, packet buffering is not as much an issue in Node B hardware. Figure 27. Receiver L1 buffer size for dual channel SAW HARQ As an example, Table 11 to Table 22 show maximum estimated receiver buffer sizes for 4-channel SAW HARQ. Chase combining,
description: The Figure of Merit (FOM) is a parameter used in the context of UE self-dense to evaluate and compare the performance of different frequency bands, specifically in relation to the REFSENS exception. It provides a quantitative measure to assess the difficulty of meeting PC3 REFSENS requirements in various bands.
explanation: The FOM is classified as a Parameter because it is used as a metric to quantify and compare the performance of different frequency bands within the context of UE self-dense, specifically for evaluating the need for REFSENS exceptions. The provided context highlights its use in ranking band difficulties and studying the necessity of REFSENS exceptions based on FOM values.
section_title: 6.3	UE self-dense
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biotag_Description: O,B-Parameter,I-Parameter,I-Parameter,O,O,O,O,O,O,O,O,O,B-Device,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,O,O,B-Technology,B-Parameter,O,O,O,O