Constrained hopping in wireless communication systems
First Claim
1. In a wireless OFDMA communication that estimates multiple channels in a MIMO system operating over a given frequency band, wherein channel estimation is more efficient for allocating resources when users'"'"' symbols are transmitted in a hopping pattern over the full band, a method comprising:
- a) transmitting a user'"'"'s symbols in a hopping pattern over the full broadband;
b) receiving from a receiver a plurality of pilot signals in a more than one subband and a neighboring subband of a frequency band having an in range portion defined by a contiguous range of frequencies adjacent to the edge of the subband and an out of range portion defined by the remaining frequencies in the neighboring subband;
c) receiving a channel quality indicator (CQI) indicative of channel quality of each subband observed in a wireless device;
d) estimating a channel response-based on some of the plurality of pilot signals in more than one subband and the pilot signal in the range portion of the neighboring subband; and
e) assigning the transmission to occur in either the signal subband or to operate in more than one subband based on a determination of the channel quality indicator.
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Accused Products
Abstract
Embodiments described provide for channel estimation and resource allocation for a transmission to a wireless device. The frequency band is partitioned into at least two contiguous subbands. A determination is made whether it is desirable to transmit in a single subband or in more than one subband. The transmission is assigned to occur in either the single subband or to operate in more than one subband. If the transmission is restricted to one subband, the hop pattern is also restricted to subcarriers within the particular subband.
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Citations
14 Claims
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1. In a wireless OFDMA communication that estimates multiple channels in a MIMO system operating over a given frequency band, wherein channel estimation is more efficient for allocating resources when users'"'"' symbols are transmitted in a hopping pattern over the full band, a method comprising:
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a) transmitting a user'"'"'s symbols in a hopping pattern over the full broadband; b) receiving from a receiver a plurality of pilot signals in a more than one subband and a neighboring subband of a frequency band having an in range portion defined by a contiguous range of frequencies adjacent to the edge of the subband and an out of range portion defined by the remaining frequencies in the neighboring subband; c) receiving a channel quality indicator (CQI) indicative of channel quality of each subband observed in a wireless device; d) estimating a channel response-based on some of the plurality of pilot signals in more than one subband and the pilot signal in the range portion of the neighboring subband; and e) assigning the transmission to occur in either the signal subband or to operate in more than one subband based on a determination of the channel quality indicator. - View Dependent Claims (2, 3, 4)
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5. A non-transitory machine readable medium having stored thereon instructions to:
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a) transmit a user'"'"'s symbols in hopping pattern over the full broadband in a wireless OFDMA communication that estimates multiple channels in a MIMO system operating over a given frequency band;
determine that a pilot signal in a subband and a neighboring subband have been received at a receiver;b) receive a plurality of pilot signals in more than a subband of a frequency band; c) receive a channel quality indicator (CQI) indicative of channel quality of each subband observed in a wireless device; d) estimate a channel response for a subcarrier within the subband based on some of the plurality of pilot signals received in one subband, for that one subband; and e) assigning the transmission to occur in either the signal subband or to operate in more than one subband based on a determination of the channel quality indicator.
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6. An apparatus for channel estimation that is more efficient for allocating resources when users'"'"' symbols are transmitted in a hopping pattern over the full band comprising:
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a) means for transmitting a user'"'"'s symbols in a hopping pattern over the full broadband in a wireless OFDM communication that estimates multiple channels in a MIMO system operating over a given frequency band; b) means for receiving a plurality of pilot signals in more than a subband of a frequency band; c) means for receiving a channel quality indicator (CQI) indicative of channel quality of each subband observed in a wireless device; d) means for estimating a channel response for a subcarrier within the subband based on some of the plurality of pilot signals in the subband and the pilot signal in the range of the neighboring subband received in one subband, for that one subband; and e) means for assigning the transmission to occur in either the signal subband or to operate in more than one subband based on the determination. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14)
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Specification