Abstract
A wireless transmission device of the present invention includes n (where n is an integer of two or more) transmission antennas and a delay imparting section for delaying transmission signals supplied to the n transmission antennas by a maximum delay time (n?1)T or less based on a delay time T dependent upon a communication signal which indicates whether to transmit the transmission signals by way of frequency diversity or multiuser diversity.
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| Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | |||||
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| Declaration Date | Declaration Reference | Declaring Company | Specification Number | ||||||
| 4G | 04/07/2013 | ISLD-201307-002 | HUAWEI |
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| PL2280495T3 | ----- | ----- | ----- | ----- | ----- | ----- | ----- | |||
| Publication No | Technology | Declaration Information | Specification Information | Explicitly Disclosed | Patent Type | Status | National Phase Entries | |||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
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| ----- | ----- | ----- | ----- | ----- |
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Technologies
Signal Processing
Product
Not Available
Use Cases
Wireless communication
Services
Not Available
Claim
1. A transmission control method adapted to a transmission apparatus in a transmission system in which slots are assigned to chunks divided in a frequency domain and in a time domain,
said transmission control method comprising:
imparting delays to signals being supplied to a plurality of transmission antennas;
controlling the delays, at a first instance, such that a maximum delay time among the plurality of transmission antennas is set to a third value larger than 1/Fc where Fc denotes a frequency band width of each chunk with respect to a multicast/broadcast channel; and
controlling the delays, at a second instance, such that a maximum delay time among the plurality of transmission antennas is selectively set to either a first value smaller than 1/Fc or a second value larger than 1/Fc with respect to another physical channel,
wherein the controlling of the delays is performed in the transmission apparatus.', 'said transmission control method comprising:', 'imparting delays to signals being supplied to a plurality of transmission antennas;', 'controlling the delays, at a first instance, such that a maximum delay time among the plurality of transmission antennas is set to a third value larger than 1/Fc where Fc denotes a frequency band width of each chunk with respect to a multicast/broadcast channel; and', 'controlling the delays, at a second instance, such that a maximum delay time among the plurality of transmission antennas is selectively set to either a first value smaller than 1/Fc or a second value larger than 1/Fc with respect to another physical channel,', 'wherein the controlling of the delays is performed in the transmission apparatus.
2. The transmission control method according to claim 1, wherein a delay time T is set to a second transmission antenna on the basis of a first transmission antenna, and wherein delay times are sequentially increased with respect to a third transmission antenna and its subsequent transmission antenna on the basis of the first transmission antenna by a multiple of the delay time T.
3. The transmission control method according to claim 1, wherein the delays imparted to the signals being supplied to the plurality of transmission antennas are controlled.
4. The transmission control method according to claim 1, wherein the maximum delay time is reduced by decreasing the number of the transmission antennas used for transmitting the signals.
5. The transmission control method according to claim 1, wherein the maximum delay time is controlled by imparting the delays in the time domain.
6. The transmission control method according to claim 5, wherein the delays are imparted to the signals being supplied to the transmission antennas in units of valid symbols so that a guard interval is applied to each unit of the guard symbol having the delays, thus controlling the maximum delay time.
7. The transmission control method according to claim 1, wherein the maximum delay time is controlled by imparting the delays in the frequency domain.
8. The transmission control method according to claim 7, wherein the transmission system is a multicarrier transmission system, and wherein the signals which are processed in units of users are allocated to subcarriers so that a predetermined amount of phase rotation is performed in units of subcarriers, thus controlling the maximum delay time.
9. The transmission control method according to claim 1, wherein the third value is the same value as the second value
10. The transmission control method according to claim 1, wherein the third value is a different value than the second value.']
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