Synchronization channel noise power estimation
First Claim
1. An apparatus comprising:
- a first symbol processing module coupled to receive a first pre-defined number of symbols of a slot of a downlink common pilot channel that has multiple slots, in which the first symbol processing module accumulates over the first pre-defined number of symbols to obtain a first average noise estimation over the first pre-defined number of symbols for the slot, wherein the first average noise estimation includes noise effects of a synchronization channel that is present during a time period synchronized to the first pre-defined number of symbols; and
a second symbol processing module coupled to receive subsequent N number of symbols of the slot following the first pre-defined number of symbols of the slot, in which the second symbol processing module accumulates over the N number of symbols of the slot of the downlink common pilot channel to obtain a second average noise estimation, wherein the second average noise estimation does not include the noise effects of the synchronization channel; and
a third processing module to subtract the second average noise estimation from the first average noise estimation to derive a noise estimation for the synchronization channel.
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Abstract
Apparatus and method to process a pilot channel and a synchronization channel to obtain a combined noise estimate of the pilot channel and the synchronization channel that is synchronized to the pilot channel. The combined noise estimation is processed to determine a first noise component for a period when both the pilot channel and the synchronization channel are present. Then, the combined noise estimate is processed to determine a second noise component for a period when only the pilot channel is present. Next, the second noise component is subtracted from the first noise component to derive a noise estimation for the synchronization channel. The technique may be applied to the Common Pilot Channel (CPICH), and the Synchronization Channel (SCH) defined in a 3rd Generation Partnership Project standard specification.
11 Citations
11 Claims
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1. An apparatus comprising:
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a first symbol processing module coupled to receive a first pre-defined number of symbols of a slot of a downlink common pilot channel that has multiple slots, in which the first symbol processing module accumulates over the first pre-defined number of symbols to obtain a first average noise estimation over the first pre-defined number of symbols for the slot, wherein the first average noise estimation includes noise effects of a synchronization channel that is present during a time period synchronized to the first pre-defined number of symbols; and a second symbol processing module coupled to receive subsequent N number of symbols of the slot following the first pre-defined number of symbols of the slot, in which the second symbol processing module accumulates over the N number of symbols of the slot of the downlink common pilot channel to obtain a second average noise estimation, wherein the second average noise estimation does not include the noise effects of the synchronization channel; and a third processing module to subtract the second average noise estimation from the first average noise estimation to derive a noise estimation for the synchronization channel. - View Dependent Claims (2, 3, 4, 5)
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6. A method comprising:
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processing a first pre-defined number of symbols of a slot of a downlink common pilot channel that has multiple slots, in order to accumulate over the first pre-defined number of symbols to obtain a first average noise estimation over the first pre-defined number of symbols for the slot, wherein the first average noise estimation includes noise effects of a synchronization channel that is present during a time period synchronized to the first pre-defined number of symbols; processing subsequent N number of symbols of the slot following the first pre-defined number of symbols of the slot, in order to accumulate over the N number of symbols of the slot of the downlink common pilot channel to obtain a second average noise estimation, wherein the second average noise estimation does not include the noise effects of the synchronization channel; and processing to subtract the second average noise estimation from the first average noise estimation to derive a noise estimation for the synchronization channel. - View Dependent Claims (7, 8, 9, 10, 11)
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Specification