Configuration of non-orthogonal dmrs for uplink transmission
A link, user equipment technology, applied in the field of accurate
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[0027] As described above, the uplink DMRS design affects the uplink channel estimation accuracy for PUSCH, and thus the reliability and throughput of uplink transmissions. In order to support a large number of UEs that are typically part of a wireless communication system, current systems require a large number of DMRS sequences to minimize traffic collisions between multiple UEs transmitting using the same DMRS sequence. However, this approach is not always possible.
[0028] Specifically, as shown in Table 1 below, the table shows the requirements for the number of DMRS sequences for various collision probabilities. In order to achieve a low collision probability, a large DMRS pool is required.
[0029]
[0030]
[0031] Table 1.0
[0032] (Number of DMRSs required for a given packet arrival rate in one time and frequency resource)
[0033] For example, for license-free UL transmission, a large number of different DMRS sequences are required to support a large numbe...
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