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Patent US6249669B1 successfully refreshed from Google Patents.
US6249669B1
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Diversity wireless communication method and its wireless communication apparatus
Assignee: Hitachi Ltd
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Filing: 2000-02-28
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Granted: 2001-06-19
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Expires: 2020-02-28
Abstract
Abstract In the conventional diversity reception, information included in each non-selected signal does not contribute to an improvement in the reliability of communications, and transmitting power has been dissipated to satisfy required communication quality. Owing to the setting of encoding in respective base stations to injection, signals each including the same contents, which are received by a mobile station, are used for increasing the reliability of communications without depending on the number of the signals which were capable of being received by the mobile station, to thereby reduce transmitting power for satisfying required communication quality.
Inventors
- 👤 Atsushi Ogino
- 👤 Hideya Suzuki
- 👤 Tomoaki Ishifuji
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 14:21
CPC Classifications
H; H03; H03M; H03M13/00; H03M13/03; H03M13/05; H03M13/13; H03M13/132; G; G01; G01B; G01B21/00; G01B21/16; G01B5/00; G01B5/14; H03M13/15; H04; H04B; H04B7/00; H04B7/02; H04B7/022; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
219 words
A diversity wireless communication method for transmitting data having the same contents from a plurality of wireless transmitting stations through radio channels different from each other and performing diversity reception of the data having the same contents in a wireless receiving station, comprising the steps of: allowing said each of the plurality of wireless transmitting stations to effect encoding to be injective and specified by a transmitting radio channel on the data having the same contents; causing each of the plurality of wireless transmitting station stations to transmit encoded data to the wireless receiving station; allowing the wireless receiving station to temporarily store the received data obtained through the radio channels every radio channel; when a single received data to be temporarily stored is obtained through a radio channel alone, causing the wireless receiving station to decode the single received data by a decoding method corresponding to encoding specified by a radio channel through which the single received data passed; when plural received data to be temporarily stored are obtained through plural radio channels, allowing said wireless receiving station to decode the plural received data as a sequence in which an error pattern is added to a code word in an error correcting code, after the plural received data are combined in predetermined order according to the radio channels.
Claim 2
Dependent Claim
219 words
A diversity wireless communication method for transmitting data having the same contents from a plurality of wireless transmitting stations through radio channels different from each other and performing diversity reception of the data having the same contents in a wireless receiving station, comprising the steps of: allowing said each of the plurality of wireless transmitting stations to effect encoding to be injective and specified by a transmitting radio channel on the data having the same contents; causing each of the plurality of wireless transmitting station stations to transmit encoded data to the wireless receiving station; allowing the wireless receiving station to temporarily store the received data obtained through the radio channels every radio channel; when a single received data to be temporarily stored is obtained through a radio channel alone, causing the wireless receiving station to decode the single received data by a decoding method corresponding to encoding specified by a radio channel through which the single received data passed; when plural received data to be temporarily stored are obtained through plural radio channels, allowing said wireless receiving station to decode the plural received data as a sequence in which an error pattern is added to a code word in an error correcting code, after the plural received data are combined in predetermined order according to the radio channels.
Claim 3
Dependent Claim
52 words
A diversity wireless communication method according to claim 1 , wherein individual encoding to be specified by each radio channel is encoding based on algebraic-geometric codes, and a divisor used for generation of the code word upon the encoding based on the algebraic-geometric codes is different from one another every radio channel.
Claim 4
Dependent Claim
39 words
A diversity wireless communication method according to claim 2 , wherein a genus of an algebraic curve for defining the generation of the code word upon the individual encoding based on the algebraic-geometric codes is assumed to be zero.
Claim 5
Dependent Claim
56 words
A diversity wireless communication method according to claim 1 , wherein individual encoding to be specified by each radio channel is encoding based on convolutional codes, and a transfer function matrix used for the generation of the code word upon the individual encoding based on the convolutional codes is different from one another every radio channel.
Claim 6
Dependent Claim
98 words
A diversity wireless communication method according to claim 4 , wherein individual encoding to be specified by each radio channel is encoding by linear-feedforward shift register, and the encoding by linear-feedforward shift register is different from one another every radio channel, and the wireless receiving station temporarily stores therein each of the received data obtained from the plurality of wireless transmitting stations respectively, combines the received data in predetermined order according to the radio channels for receiving the received data temporarily stored therein, and thereafter performs an error correction on combined data according to the Viterbi decoding algorithms.
Claim 7
Dependent Claim
102 words
A diversity wireless communication method according to claim 1 , wherein the wireless receiving station temporarily stores therein each of the received data obtained through the radio channels and received signal strength value thereof every radio channel, and selects, particularly when some of the received signal strength value of the received data temporarily stored therein exceeds a predetermined threshold, one received data corresponding to the received signal strength value having exceeded the predetermined threshold, and decodes the one received data by a decoding method corresponding to encoding to be specified by a radio channel through which the one received data has passed.
Claim 8
Dependent Claim
130 words
A diversity wireless communication method according to claim 1 , wherein individual encoding to be specified by each radio channel is not surjection but injection, a method of performing the individual encoding to be specified by each radio channel is known to the wireless receiving station, and the wireless receiving station temporarily stores therein each of the received data obtained through the radio channels every radio channel, and thereafter calculates a syndrome for each of received data, and particularly when some of the received data free of error detection exist, the wireless receiving station selects one received data from some of the received data and decodes the same by a decoding method corresponding to encoding to be specified by a radio channel through which the one received data has passed.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2004-06-18 | 2004-12-18 | 2005-06-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-06-18 | 2008-12-18 | 2009-06-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-06-18 | 2012-12-18 | 2013-06-19 | $7700.00 | Window Closed / Lapsed |