Communication apparatus and communication method utilizing multiple carrier waves for overcoming interference
First Claim
1. A communication apparatus comprising:
- a transmission modulator for impulse modulating transmission data into subcarrier modulation signals using a plurality of subcarriers;
a transmission part for generating a plurality of subcarrier-transmission signals by amplifying the plurality of subcarrier modulation signals;
a filter section for filtering the plurality of subcarrier-transmission signals, the subcarrier-transmission signals being band-limited within a bandwidth allocated for each of the subcarriers the subcarrier transmission signals having a cumulative bandwidth narrower than a bandwidth of the subcarrier modulation signals;
a carrier control section for controlling the subcarriers for use in communication depending upon information amount, significance and communication propagation condition; and
an antenna section for multiplexing and radiating the filtered subcarrier transmission signals.
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0 Petitions
Accused Products
Abstract
There are included a transmission modulator (103) for impulse-modulating the data to be transmitted, thereby producing a subcarrier; a subcarrier control section for controlling the subcarrier to be utilized for communication, depending on the amount and significance of information and on the propagation condition of communication; and an antenna section (101) for radiating the subcarrier signal. This structure allows selection of a subcarrier suitable for information to be transmitted and for propagation environment, and hence allows a communication to be performed which exhibits a high flexibility and a high noise immunity. Thus, there can be provided a communication apparatus that can perform a high-quality, high-stability communication exhibiting an improved interfering immunity and that performs a flexible impulse communication.
29 Citations
35 Claims
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1. A communication apparatus comprising:
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a transmission modulator for impulse modulating transmission data into subcarrier modulation signals using a plurality of subcarriers; a transmission part for generating a plurality of subcarrier-transmission signals by amplifying the plurality of subcarrier modulation signals; a filter section for filtering the plurality of subcarrier-transmission signals, the subcarrier-transmission signals being band-limited within a bandwidth allocated for each of the subcarriers the subcarrier transmission signals having a cumulative bandwidth narrower than a bandwidth of the subcarrier modulation signals; a carrier control section for controlling the subcarriers for use in communication depending upon information amount, significance and communication propagation condition; and an antenna section for multiplexing and radiating the filtered subcarrier transmission signals. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32)
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33. A communication method comprising the steps of:
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impulse modulating transmission data into subcarrier modulation signals using a plurality of subcarriers; generating a plurality of subcarriers transmission signals by amplifying the plurality of subcarrier modulation signals; and filtering the subcarrier transmission signals, the subcarrier transmission signals being band limited within a bandwidth allocated for each of the subcarriers, the subcarrier transmission signals having a cumulative bandwidth narrower than a bandwidth of the subcarrier modulation signals transmitting, by an antenna, the filtered subcarrier transmission signals, and measuring a reception power on each of the subcarriers in a non-signal state, in an initial state prior to starting a communication; and determining the reception power measured and selecting the subcarrier usable in communication. - View Dependent Claims (34, 35)
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Specification