Open-loop transmit diversity schemes with four transmit antennas
First Claim
1. A method for receiving a physical broadcast channel (PBCH), comprising:
- receiving a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones;
decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at a transmit power for each transmit antenna corresponding to the density; and
receiving a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones.
1 Assignment
0 Petitions
Accused Products
Abstract
In a wireless communication system, SFBC-based (Space-Frequency Block-Code) transmission diversity schemes provide enhancement for multiple antennas, such as the illustrative four, in order to achieve better performance than SFBC-FSTD (SFBC-Frequency Switching Transmit Diversity) alone. SFBC-PFSTD (Precoded Frequency Switching Transmit), which is multiplying a precoding matrix to the SFBC-FSTD signals, opens up the possibility of utilizing the pilot tones in synchronization channels (SSC and/or PSC) to enhance the channel estimation performance for antenna 2 and 3 that have only the half as many pilot tones as antenna 0 and 1. Further improvements are disclosed for use of Frequency Time Switching Transmit Diversity (FTSTD) and Precoding Vector Switch.
12 Citations
51 Claims
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1. A method for receiving a physical broadcast channel (PBCH), comprising:
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receiving a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones; decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at a transmit power for each transmit antenna corresponding to the density; and receiving a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones. - View Dependent Claims (2, 3, 4)
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5. A method for receiving a physical broadcast channel (PBCH), comprising:
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receiving a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones; receiving a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones; decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at a transmit power for each transmit antenna corresponding to the density; and decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at an increased transmit power for each transmit antenna by detecting pilot tones of a synchronization channel and the SFBC-based PBCH. - View Dependent Claims (6, 7, 8, 9, 10)
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11. At least one processor for receiving a physical broadcast channel (PBCH), comprising:
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a first hardware module for receiving a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones and for receiving a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones; and a second hardware module for decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at a transmit power for each transmit antenna corresponding to the density.
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12. A computer program product for receiving a physical broadcast channel (PBCH), comprising:
a non-transitory computer-readable storage medium comprising; a first set of codes for causing a computer to receive a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones; a second set of codes for causing the computer to decode the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at a transmit power for each transmit antenna corresponding to the density; and a third set of codes for causing the computer to receive a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones.
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13. An apparatus for receiving a physical broadcast channel (PBCH), comprising:
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hardware means for receiving a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones; hardware means for decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at a transmit power for each transmit antenna corresponding to the density; and hardware means for receiving a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones.
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14. An apparatus for receiving a physical broadcast channel (PBCH), comprising:
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a receiver for receiving a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones, wherein the receiver is further for receiving a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones; and a computing platform for decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at a transmit power for each transmit antenna corresponding to the density. - View Dependent Claims (15, 16, 17)
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18. An apparatus for receiving a physical broadcast channel (PBCH), comprising:
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a receiver for receiving a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones, wherein the receiver is further for receiving a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones; and a computing platform for decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at a transmit power for each transmit antenna corresponding to the density, wherein the computing platform is further for decoding the SFBC-based PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at an increased transmit power for each transmit antenna by detecting pilot tones of a synchronization channel and the SFBC-based PBCH. - View Dependent Claims (19, 20, 21, 22, 23)
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24. A method for transmitting a physical broadcast channel (PBCH), comprising:
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transmitting a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones; encoding the SFBC-based PBCH by transmitting the different density of pilot tones from each respective transmit antenna at a transmit power for each transmit antenna corresponding to the density; and transmitting a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32)
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33. A method for transmitting a physical broadcast channel (PBCH), comprising:
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transmitting a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones; encoding the SFBC-based PBCH by transmitting the different density of pilot tones from each respective transmit antenna at a transmit power for each transmit antenna corresponding to the density; encoding the SFBC-based PBCH for decoding by transmitting pilot tones of a synchronization channel for detection with the SFBC-based PBCH; transmitting a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones; and performing SFBC-PVS (Precoded Vector Switch) from four transmit antennas by; encoding pilot tones of a PBCH precoded by a precoding matrix used by a synchronization channel; and encoding pilot tones of the synchronization channel by use of the precoding matrix.
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34. At least one processor for transmitting a physical broadcast channel (PBCH), comprising:
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a first hardware module for transmitting a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones and for transmitting a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones; and a second hardware module for encoding the SFBC-based PBCH by transmitting the different density of pilot tones from each respective transmit antenna at a transmit power for each transmit antenna corresponding to the density.
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35. A computer program product for transmitting a physical broadcast channel (PBCH), comprising:
a non-transitory computer-readable storage medium comprising; a first set of codes for causing a computer to transmit a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones; a second set of codes for causing the computer to encode the SFBC-based PBCH by transmitting the different density of pilot tones from each respective transmit antenna at a transmit power for each transmit antenna corresponding to the density; and a third set of codes for causing the computer to transmit a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones.
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36. An apparatus for transmitting a physical broadcast channel (PBCH), comprising:
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hardware means for transmitting a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones; hardware means for encoding the SFBC-based PBCH by transmitting the different density of pilot tones from each respective transmit antenna at a transmit power for each transmit antenna corresponding to the density; and hardware means for transmitting a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones.
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37. An apparatus for transmitting a physical broadcast channel (PBCH), comprising:
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a transmitter for transmitting a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones, wherein the transmitter is further for transmitting a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones; and a computing platform for encoding the SFBC-based PBCH by transmitting the different density of pilot tones from each respective transmit antenna at a transmit power for each transmit antenna corresponding to the density. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45)
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46. An apparatus for transmitting a physical broadcast channel (PBCH), comprising:
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a transmitter for transmitting a physical broadcast channel (PBCH) transmitted by Space Frequency Block Code (SFBC) from a plurality of transmit antennas assigned a different density of pilot tones, wherein the transmitter is further for transmitting a diversified portion of the SFBC-based PBCH transmitted at a transmit gain inversely adjusted per the density of pilot tones to match a total transmit power for another transmit antenna having a different density of pilot tones; a computing platform for encoding the SFBC-based PBCH by transmitting the different density of pilot tones from each respective transmit antenna at a transmit power for each transmit antenna corresponding to the density, wherein the computing platform is further for encoding the SFBC-based PBCH for decoding by transmitting pilot tones of a synchronization channel for detection with the SFBC-based PBCH; and four transmit antennas for performing SFBC-PVS (Precoded Vector Switch), wherein the computing platform is further for encoding pilot tones of a PBCH precoded by a precoding matrix used by a synchronization channel, and for encoding pilot tones of the synchronization channel by use of the precoding matrix.
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47. A method for receiving a physical broadcast channel (PBCH), comprising:
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receiving a physical broadcast channel (PBCH) and a synchronization channel transmitted from a base station, the PBCH transmitted from a plurality of transmit antennas assigned a different density of pilot tones; decoding the PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at an increased transmit power for each transmit antenna by detecting pilot tones of the PBCH and pilot tones of the synchronization channel; accessing a precoding matrix for the synchronization channel; and decoding the pilot tones for both the synchronization channel and the PBCH using the precoding matrix.
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48. At least one processor for receiving a physical broadcast channel (PBCH), comprising:
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a first hardware module for receiving a physical broadcast channel (PBCH) and a synchronization channel transmitted from a base station, the PBCH transmitted from a plurality of transmit antennas assigned a different density of pilot tones; and a second hardware module for decoding the PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at an increased transmit power for each transmit antenna by detecting pilot tones of the PBCH and pilot tones of the synchronization channel, accessing a precoding matrix for the synchronization channel, and decoding the pilot tones for both the synchronization channel and the PBCH using the precoding matrix.
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49. A computer program product for receiving a physical broadcast channel (PBCH), comprising:
a non-transitory computer-readable storage medium comprising; a first set of codes for causing a computer to receive a physical broadcast channel (PBCH) and a synchronization channel transmitted from a base station, the PBCH transmitted from a plurality of transmit antennas assigned a different density of pilot tones; and a second set of codes for causing the computer to decode the PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at an increased transmit power for each transmit antenna by detecting pilot tones of the PBCH and pilot tones of the synchronization channel, access a precoding matrix for the synchronization channel, and decode the pilot tones for both the synchronization channel and the PBCH using the precoding matrix.
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50. An apparatus for receiving a physical broadcast channel (PBCH), comprising:
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hardware means for receiving a physical broadcast channel (PBCH) and a synchronization channel transmitted from a base station, the PBCH transmitted from a plurality of transmit antennas assigned a different density of pilot tones; and hardware means for decoding the PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at an increased transmit power for each transmit antenna by detecting pilot tones of the PBCH and pilot tones of the synchronization channel, accessing a precoding matrix for the synchronization channel, and decoding the pilot tones for both the synchronization channel and the PBCH using the precoding matrix.
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51. An apparatus for receiving a physical broadcast channel (PBCH), comprising:
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a receiver for receiving a physical broadcast channel (PBCH) and a synchronization channel transmitted from a base station, the PBCH transmitted from a plurality of transmit antennas assigned a different density of pilot tones; and a computing platform for decoding the PBCH by detecting the different density of pilot tones from each respective transmit antenna that are transmitted at an increased transmit power for each transmit antenna by detecting pilot tones of the PBCH and pilot tones of the synchronization channel, accessing a precoding matrix for the synchronization channel, and decoding the pilot tones for both the synchronization channel and the PBCH using the precoding matrix.
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Specification