摘要:
In a TDS-OFDM receiver a device for frequency-domain compensation for channel estimation at an over-sampling rate is provided. The device includes a correlater for correlating a first signal and a second signal; a transformer for transforming the correlated signals into a frequency domain; and an interpolater and truncater block for interpolating and truncating the transformed signal to have the interpolated and truncated, transformed signal as a reference for future use.
摘要:
A channel estimation using the received PN (pseudo-noise) sequence associated with a received frame among a plurality of associated, neighboring frames. The estimation using a value associated with a point of a currently frame as a denominator in a predetermined formula. If the value is smaller than its corresponding value in a neighboring frame, the neighboring frame's corresponding value is used instead of the value of the current frame.
摘要:
In a VSB system, a method for channel modeling to estimate coefficients corresponding to a selected subspace is provided. The method comprises the steps of: selected a predetermined subspace; creating a set of bi-orthogonal vectors for the initially selected subspace; and obtaining a set of coefficients by solving a linear programming problem. Whereby the resultant channel is constructed by the coefficients and their associated subspace.
摘要:
In an orthogonal frequency division multiplexing (OFDM) multiple-input multiple-output (MIMO) wireless communication system, a method is provided. In the OFDM MIMO wireless communication system, both a transmitter and a receiver include a plurality of antennas. The method comprising the step of: a receiver using at least one pseudo noise (PN) to correlate desired information relating to a received symbol; and performing channel estimation using the correlated information.
摘要:
In a communication system with multiple base stations having at least one base station with communications overlaps with at least another base station, a method is provided. The method comprising the steps of: characterizing the users into a first group and a second group, and adjusting some PN lengths of transmitted information for one group of users. The system includes users of a TDS-OFDM system,
摘要:
In a TDS-OFDM communications system for uplink wireless communication multiple accesses through sub-channelization, the system comprising: a plurality of users with each user using a portion of available time-frequency radio resources to achieve orthogonal multiple access; a plurality of available bandwidth, wherein the available bandwidth is divided into multiple sub-bands; at least one the sub-carrier in each sub-band. Inside the sub-band for each user, at least one guard sequence, being used as the guard interval between transmitted symbols.
摘要:
A method for compensating channel changes in an OFDM system is provided. The method comprises the steps of: providing at least two PN sequences; and using the parameters of the at least two PN sequences for determining a set of compensated values of data disposed between the at least two PN sequences.
摘要:
A method for creating a dictionary for channel modeling is provided. The method comprising the steps of: providing a channel subject to modeling associated with a VSB system; over-sampling a predetermined segment; and using at least part of the over-sampled values as elements or words of the dictionary.
摘要:
In a VSB system, a method and receiver for channel modeling is provided. The method comprises the steps of: performing matching pursuit conducted locally with assistant information; and performing basis perturbation using the assistant information.
摘要:
A receiving device is provided that comprises: a channel estimator adapted to receive an input; and an equalizer adapted to receive the input and generate an equalized output, wherein the equalized output is used by the channel estimator for at least one subsequent channel estimation.