Patent US5329548A successfully refreshed from Google Patents.
US5329548A
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Base station for a frequency hopping TDMA radio communication system
Assignee: Telefonaktiebolaget LM Ericsson AB
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Filing: 1993-03-26
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Granted: 1994-07-12
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Expires: 2013-03-26
Abstract
Abstract A base station for a cellular frequency hopping TDMA radio communication system comprises at least two transmitter groups, each containing at least one transmitter, connected to individual antennas in an antenna group of a cell. Means are included for controlled frequency hopping in at least one TDMA channel such that its signal bursts are distributed on different antennas in the antenna group.
Inventors
- 👤 Lars U. Borg
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 13:01
CPC Classifications
H; H04; H04W; H04W88/00; H04W88/08; H04B; H04B7/00; H04B7/24; H04B7/26; H04B7/2603; H04B7/2609
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
73 words
A base station for cellular frequency hopping TDMA radio communication systems, comprising: at least two transmitter groups, each including at least one transmitter, each transmitter group being permanently connected to one respective antenna in an antenna group of a cell, and means for controlled frequency hops in at least one TDMA channel, such that the signal bursts thereof are distributed on different transmitter groups and therefor on different antenna within the antenna group.
Claim 2
Dependent Claim
73 words
A base station for cellular frequency hopping TDMA radio communication systems, comprising: at least two transmitter groups, each including at least one transmitter, each transmitter group being permanently connected to one respective antenna in an antenna group of a cell, and means for controlled frequency hops in at least one TDMA channel, such that the signal bursts thereof are distributed on different transmitter groups and therefor on different antenna within the antenna group.
Claim 3
Dependent Claim
20 words
The base station of claim 1, wherein all antennas in the antenna group are always sending on the different frequencies.
Claim 4
Dependent Claim
22 words
The base station of claim 2, wherein the distance between antennas in the antenna group exceeds more than a few carrier wavelengths.
Claim 5
Dependent Claim
22 words
The base station of claim 3, further comprising means for cyclic distribution of the signal bursts on antennas within the antenna group.
Claim 6
Dependent Claim
22 words
The base station of claim 3, further comprising means for randomly distributing the signal bursts on the antennas within the antenna group.
Claim 7
Dependent Claim
24 words
The base station of claim 3, further comprising means for demand controlled distribution of the signal bursts on the antennas within the antenna group.
References Cited (Backward Citations)
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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) | 1997-07-11 | 1998-01-10 | 1998-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-07-11 | 2002-01-10 | 2002-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-07-11 | 2006-01-10 | 2006-07-12 | $7700.00 | Window Closed / Lapsed |