Adaptive pilot allocation method and apparatus for use in a communication system
First Claim
1. A method for adaptively allocating pilots in a communication system, comprising:
- measuring a multipath delay between a base station (BS) and a mobile station (MS); and
controlling a distribution density of pilots of a signal to be transmitted between the BS and the MS, relatively raising the pilot distribution density when the multipath delay is large, and relatively lowering the pilot distribution density when the multipath delay is small.
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Accused Products
Abstract
A method and apparatus are provided for adaptively allocating pilots in a pilot-aided channel estimation system. A multipath delay is measured between a base station (BS) and a mobile station (MS). A distribution density of pilots of a signal to be transmitted between the BS and the MS is controlled. When the multipath delay is large, the pilot distribution density is relatively raised. However, when the multipath delay is small, the pilot distribution density is relatively lowered. The pilot distribution density is adaptively controlled according to the multipath delay, such that resources are effectively utilized and throughput is improved.
59 Citations
33 Claims
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1. A method for adaptively allocating pilots in a communication system, comprising:
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measuring a multipath delay between a base station (BS) and a mobile station (MS); and
controlling a distribution density of pilots of a signal to be transmitted between the BS and the MS, relatively raising the pilot distribution density when the multipath delay is large, and relatively lowering the pilot distribution density when the multipath delay is small. - View Dependent Claims (2, 3, 4)
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5. A method for adaptively allocating pilots in a base station (BS) of a communication system, comprising:
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receiving, from at least one mobile station (MS), information indicative of a multipath delay between the BS and the at least one MS; and
controlling a distribution density of pilots of a signal to be transmitted to the at least one MS by increasing the pilot distribution density when the multipath delay is large and decreasing the pilot distribution density when the multipath delay is small. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A method for adaptively allocating pilots in a mobile station (MS) of a communication system, comprising the steps of:
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measuring a multipath delay from a signal received from a base station (BS); and
controlling a distribution density of pilots of a signal to be transmitted to the BS, by increasing the pilot distribution density when the multipath delay is large, and by decreasing the pilot distribution density when the multipath delay is small. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An apparatus for adaptively allocating pilots in a base station (BS) of a communication system, comprising:
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a data mapper for mapping, to a data burst interval of a downlink frame, data to be transmitted to at least one mobile station (MS);
an adaptive pilot pattern generator for generating pilots according to a designated pilot pattern;
a pilot inserter for inserting the pilots generated by the adaptive pilot pattern generator into an output of the data mapper; and
a coordinator for controlling the data mapper and the adaptive pilot pattern generator according to information, received from the at least one MS, indicating a multipath delay between the BS and the at least one MS, relatively raising a distribution density of pilots of a signal to be transmitted to the at least one MS when the multipath delay is large, and relatively lowering the pilot distribution density when the multipath delay is small. - View Dependent Claims (21, 22, 23, 24, 25, 26)
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27. An apparatus for adaptively allocating pilots in a mobile station (MS) of a communication system, comprising:
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a delay spread estimator for estimating a delay spread of a signal received from a base station (BS);
a data mapper for mapping, to a data burst interval of an uplink frame, data to be transmitted to the BS;
an adaptive pilot pattern generator for generating pilots according to a designated pilot pattern;
a pilot inserter for inserting the pilots generated by the adaptive pilot pattern generator into an output of the data mapper; and
a coordinator for controlling the data mapper and the adaptive pilot pattern generator according to a multipath delay measured by the delay spread estimator, by increasing a distribution density of pilots of a signal to be transmitted to the BS when the multipath delay is large, and by decreasing the pilot distribution density when the multipath delay is smaller - View Dependent Claims (28, 29, 30, 31, 32, 33)
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Specification