Abstract
Methods and devices are provided for MIMO OFDM transmitter and receivers having odd and/even numbers of transmit antennas. Various methods for pre-coding information bits before space time coding (STC) are described for enabling transmission of information bits over all antennas. Methods of decoding received signals that have been pre-coded and STC coded are also provided by embodiments of the invention. Pilot patterns for downlink and uplink transmission between a base station and one or more wireless terminals for three transmit antenna transmitters are also provided. Variable rate codes are provided that combine various fixed rate codes in a manner that results in codes whose rates are dependent on all the various fixed rate codes that are combined.
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4G | 10/06/2008 | ISLD-200807-005 | NORTEL NETWORKS LIMITED | No | Family Member | ||||
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4G | 27/10/2014 | ISLD-201410-033 | APPLE INC | No | Family Member | ||||
4G | 04/11/2015 | ISLD-201511-011 | APPLE INC |
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4G | 27/11/2016 | ISLD-201703-106 | APPLE INC |
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4G | 02/11/2017 | ISLD-201801-001 | APPLE INC |
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No | Family Member | |||
4G | 07/11/2018 | ISLD-201812-006 | APPLE INC |
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4G | 13/06/2019 | ISLD-201909-023 | APPLE INC |
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4G | 30/06/2020 | ISLD-202007-001 | APPLE INC | No | Family Member | ||||
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Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
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Technologies
Product
Use Cases
Services
Claim
2. A method for transmitting on three antennas comprising:
pre-coding information bits to generate 2N transmit symbols; encoding the 2N transmit symbols using at least one of a space time block code or a frequency block code in which each transmit symbol appears an equal number of times and in such a manner that each of the three antennas is utilized equally; and transmitting the at least one of the space time block code or the frequency block code over the three antennas, wherein the pre-coding and encoding are such that all of the information bits are represented in what is transmitted from each of the three antennas.
43. The method of claim 42, wherein the precoding comprises:
mapping four pairs of information bits to 4 phase shift keying (�PSK�) symbols by mapping each pair of information bits on a respective one of four rotated 4 PSK mapping constellations; and generating transmit symbols by forming combinations of real and imaginary components of the 4 PSK symbols.
44. The method of claim 43, wherein the forming combinations of the real and the imaginary components of the 4 PSK symbols comprises:
generating transmit symbols:
s 1 =Re{C 1 }+jRe{C 2};
s 2 =Re{C 3 }+jRe{C 4};
s 3 =Im{C 1 }+jIm{C 2}; and
s 4 =Im{C 3 }+jIm{C 4};
wherein:
C1 is a first of the four rotated 4PSK mapping constellations;
C2 is a second of the four rotated 4PSK mapping constellations;
C3 is a third of the four rotated 4PSK mapping constellations; and
C4 is a fourth of the four rotated 4PSK mapping constellations.
45. The method of claim 44, wherein the 4 PSK symbols are further rotated by an angle.
46. The method of claim 42, wherein the information bits are precoded using one of a M-ary QAM constellation, a 16 QAM constellation or a 64 QAM constellation.
47. The method of claim 46, wherein when the information bits are precoded using the M-ary QAM constellation, half of the constellation symbols have even parity and half of the constellation symbols have odd parity.
48. The method of claim 46, wherein when the information bits are precoded using the 64 QAM constellation, the pre-coding comprises adding a parity bit to 17 bits of data.
49. A processor configured to:
pre-code information bits to generate 2N transmit symbols; encode the 2N transmit symbols using at least one of a space time block code or a frequency block code in which each transmit symbol appears an equal number of times and in such a manner that each of three antennas are utilized equally; and transmit the at least one of the space time block code or the frequency block code over the three antennas, wherein the pre-coding and encoding are such that all of the information bits are represented in what is transmitted from each of the three antennas.
50. The processor of claim 49, wherein the precoding comprises the processor:
mapping four pairs of information bits to 4 phase shift keying (�PSK�) symbols by mapping each pair of information bits on a respective one of four rotated 4 PSK mapping constellations; and generating transmit symbols by forming combinations of real and imaginary components of the 4 PSK symbols.
51. The processor of claim 50, wherein the forming combinations of the real and the imaginary components of the 4 PSK symbols comprises the processor:
generating transmit symbols:
s 1 =Re{C 1 }+jRe{C 2};
s 2 =Re{C 3 }+jRe{C 4};
s 3 =Im{C 1 }+jIm{C 2}; and
s 4 =Im{C 3 }+jIm{C 4};
wherein:
C1 is a first of the four rotated 4PSK mapping constellations;
C2 is a second of the four rotated 4PSK mapping constellations;
C3 is a third of the four rotated 4PSK mapping constellations; and
C4 is a fourth of the four rotated 4PSK mapping constellations.
52. The processor of claim 51, wherein the 4 PSK symbols are further rotated by an angle.
53. The processor of claim 49, wherein the information bits are precoded using one of a M-ary QAM constellation, a 16 QAM constellation or a 64 QAM constellation.
54. The processor of claim 53, wherein when the information bits are precoded using the M-ary QAM constellation, half of the constellation symbols have even parity and half of the constellation symbols have odd parity.
55. The processor of claim 53, wherein when the information bits are precoded using the 64 QAM constellation, the pre-coding comprises adding a parity bit to 17 bits of data.
56. A device comprising:
three antennas; communication circuitry; and processing hardware coupled to the three antennas and the communication circuitry, wherein the processing hardware is configured to operate with the three antennas and the communication circuitry to: pre-code information bits to generate 2N transmit symbols; encode the 2N transmit symbols using at least one of a space time block code or a frequency block code in which each transmit symbol appears an equal number of times and in such a manner that each of the three antennas is utilized equally; and transmit the at least one of the space time block code or the frequency block code over the three antennas, wherein the pre-coding and encoding are such that all of the information bits are represented in what is transmitted from each of the three antennas.
57. The device of claim 56, wherein the precoding comprises:
mapping four pairs of information bits to 4 phase shift keying (�PSK�) symbols by mapping each pair of information bits on a respective one of four rotated 4 PSK mapping constellations; and generating transmit symbols by forming combinations of real and imaginary components of the 4 PSK symbols.
58. The device of claim 57, wherein the forming combinations of the real and the imaginary components of the 4 PSK symbols comprises:
generating transmit symbols:
s 1 =Re{C 1 }+jRe{C 2};
s 2 =Re{C 3 }+jRe{C 4};
s 3 =Im{C 1 }+jIm{C 2}; and
s 4 =Im{C 3 }+jIm{C 4};
wherein:
C1 is a first of the four rotated 4PSK mapping constellations;
C2 is a second of the four rotated 4PSK mapping constellations;
C3 is a third of the four rotated 4PSK mapping constellations; and
C4 is a fourth of the four rotated 4PSK mapping constellations.
59. The device of claim 58, wherein the 4 PSK symbols are further rotated by an angle.
60. The device of claim 56, wherein the information bits are precoded using one of a M-ary QAM constellation, a 16 QAM constellation or a 64 QAM constellation.
61. The device of claim 60, wherein when the information bits are precoded using the M-ary QAM constellation, half of the constellation symbols have even parity and half of the constellation symbols have odd parity.
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