Wireless transmission system, wireless communication device and wireless transmission method
First Claim
1. A wireless transmission system, comprising:
- first and second antenna pairs, each including a transmission antenna and a corresponding reception antenna that are arranged such that a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a desired wave at the reception antenna of the first antenna pair and a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as an unnecessary wave at the reception antenna of the first antenna pair; and
a transmission characteristic correction unit that calculates a correction matrix based on a transmission characteristic of a transmission space between the transmission antennae and the reception antennae based on signals received by the reception antennae to acquire an output signal corresponding to a transmission subject signal,wherein the first and second antenna pairs are arranged such that;
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Abstract
A wireless transmission system including antenna pairs, a demodulation functional unit, and a transmission characteristic correction unit. The antenna pairs include transmission and reception antennae. A desired wave arrives at a reception antenna in a wireless signal from one transmission antenna. Meanwhile, the reception antenna receives an unnecessary wave in a wireless signal transmitted from a different transmission antenna. The demodulation functional unit corresponding to each antenna pair demodulates a signal received by the reception antenna. The transmission characteristic correction unit carries out correction calculation based on a transmission characteristic of a transmission space between the transmission and reception antennae based on demodulation signals demodulated by the demodulation functional units to acquire an output signal corresponding to a transmission subject signal.
12 Citations
20 Claims
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1. A wireless transmission system, comprising:
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first and second antenna pairs, each including a transmission antenna and a corresponding reception antenna that are arranged such that a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a desired wave at the reception antenna of the first antenna pair and a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as an unnecessary wave at the reception antenna of the first antenna pair; and a transmission characteristic correction unit that calculates a correction matrix based on a transmission characteristic of a transmission space between the transmission antennae and the reception antennae based on signals received by the reception antennae to acquire an output signal corresponding to a transmission subject signal, wherein the first and second antenna pairs are arranged such that; - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wireless transmission system comprising:
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first and second antenna pairs, each including a transmission antenna and a corresponding reception antenna that are arranged such that a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a desired wave at the reception antenna of the first antenna pair and a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as an unnecessary wave at the reception antenna of the first antenna pair; and a transmission characteristic correction unit that calculates a correction matrix based on a transmission characteristic of a transmission space between the transmission antennae and the reception antennae based on signals received by the reception antennae to acquire an output signal corresponding to a transmission subject signal, wherein a distance between the transmission and reception antennae of the first antenna pair and a distance between the transmission antenna of the second antennae pair and the reception antenna of the first reception pair are set such that each of the elements of the correction matrix that correspond to the desired wave are represented only by a real number term while each of the elements of the correction matrix that correspond to the unnecessary wave are represented only by an imaginary number term. - View Dependent Claims (9)
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10. A wireless transmission system comprising:
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first and second antenna pairs, each including a transmission antenna and a corresponding reception antenna that are arranged such that a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a desired wave at the reception antenna of the first antenna pair and a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as an unnecessary wave at the reception antenna of the first antenna pair; and a transmission characteristic correction unit that calculates a correction matrix based on a transmission characteristic of a transmission space between the transmission antennae and the reception antennae based on signals received by the reception antennae to acquire an output signal corresponding to a transmission subject signal, wherein a distance between the transmission and reception antennae of the first antenna pair and a distance between the transmission antenna of the second antennae pair and the reception antenna of the first reception pair are set such that each of the elements of the correction matrix that correspond to the desired wave are represented only by a real number term while each of the elements of the correction matrix that correspond to the unnecessary wave are represented only by a real number term.
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11. A wireless transmission system, comprising:
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first and second antenna pairs, each including a transmission antenna and a corresponding reception antenna that are arranged such that a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a desired wave at the reception antenna of the first antenna pair and a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as an unnecessary wave at the reception antenna of the first antenna pair; a demodulation functional unit for each of the antenna pairs that demodulates a signal received by the reception antenna; and a transmission characteristic correction unit that calculates a correction matrix based on a transmission characteristic of a transmission space between the transmission antennae and the reception antennae based on the signals demodulated by the demodulation functional units to acquire an output signal corresponding to a transmission subject signal, wherein the first and second antenna pairs are arranged such that; - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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19. A wireless transmission system comprising:
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first and second antenna pairs, each including a transmission antenna and a corresponding reception antenna that are arranged such that a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a first desired wave at the reception antenna of the first antenna pair, a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as a first unnecessary wave at the reception antenna of the first antenna pair, a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as a second desired wave at the reception antenna of the second antenna pair, and a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a second unnecessary wave at the reception antenna of the second antenna pair; a first demodulation functional unit for the first antenna pair that demodulates a signal received by the reception antenna of the first antenna pair by quadrature detection and outputs a first Q signal and a first I signal; a second demodulation functional unit for the second antenna pair that demodulates a signal received by the reception antenna of the second antenna pair by quadrature detection and outputs a second Q signal and a second I signal; and a transmission characteristic correction unit that calculates a correction matrix based on a transmission characteristic of a transmission space between the transmission antennae and the reception antennae based on the demodulated signals to acquire output signals corresponding to transmission subject signals, wherein a distance between the transmission and reception antennae of the first antenna pair and a distance between the transmission antenna of the second antennae pair and the reception antenna of the first reception pair are set such that the first Q signal corresponds only to the first desired wave, the second Q signal corresponds only to the second desired wave, the first I signal corresponds only to the first unnecessary wave, and the second I signal corresponds only to the second unnecessary wave, and the transmission characteristic correction unit corrects the first and second Q signals and the first and second I signals based on the correction matrix, and adds a corrected first Q signal to a corrected second I signal and adds a corrected second Q signal to a corrected first I signal, to acquire the output signals corresponding to the transmission subject signals.
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20. A wireless transmission system comprising:
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first and second antenna pairs, each including a transmission antenna and a corresponding reception antenna that are arranged such that a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a first desired wave at the reception antenna of the first antenna pair, a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as a first unnecessary wave at the reception antenna of the first antenna pair, a wireless signal transmitted from the transmission antenna of the second antenna pair directly arrives as a second desired wave at the reception antenna of the second antenna pair, and a wireless signal transmitted from the transmission antenna of the first antenna pair directly arrives as a second unnecessary wave at the reception antenna of the second antenna pair; a demodulation functional unit for each of the antenna pairs that demodulates a signal received by the reception antenna by quadrature detection and outputs a demodulated signal that includes a desired wave component and an unnecessary wave component; and a transmission characteristic correction unit that calculates a correction matrix based on a transmission characteristic of a transmission space between the transmission antennae and the reception antennae based on the demodulated signals to acquire output signals corresponding to transmission subject signals, the transmission characteristic correction unit corrects each of the demodulated signals based on the correction matrix such that; the desired wave component of the demodulated signal is corrected based on only real number terms, the unnecessary wave component of the demodulated signal is corrected based on only imaginary number terms, and the transmission characteristic correction unit adds a corrected desired wave component of the demodulated signal of the first antenna pair to a corrected unnecessary wave component of the demodulated signal of the second antenna pair.
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Specification