Long training field in uplink multi-user multiple-input multiple-output communications

摘要

Embodiments for long training field (LTF) sequences or other types of sequences in uplink multi-user multiple-input multiple-output communications are provided. The LTF sequences can permit channel estimation, including determination of carrier frequency offsets. In some embodiments, an LTF sequence can be formatted and/or conveyed without reliance on pilot tones. In other embodiments, the LTF sequence can rely on pilot tones, where a sequence associated with the pilot tones can include elements that are orthogonal among transmitter station devices that communicate according to MU-MIMO.

主权项

1. An apparatus for wireless telecommunication, comprising:
at least one memory device having programmed instructions; and at least one processor functionally coupled to the at least one memory device and configured to execute the programmed instructions, and in response to execution of the programmed instructions, the at least one processor is further configured at least to:
configure a first sequence of symbols to be transmitted on a defined first tone of a frequency channel, wherein the first sequence of symbols is associated with a long training sequence, and wherein the first sequence of symbols is orthogonal to each of at least one second sequence of symbols being transmitted on respective at least one defined second tone of the frequency channel; andsend the first sequence of symbols to an access point device configured to determine at least one of a channel estimate or a carrier frequency offset using the first sequence of symbols and the at least one second sequences of symbols.