← Back to Patent Explorer
EP0328385A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

A phase adjusting system for a radio communication system

Assignee: NEC Corp
•
Filing: 1989-02-09
•
Granted: —
•
Expires: 2009-02-09
📄 Original PDF 🌐 Google Patents 🔄 Sync Now

Abstract

Abstract The system comprises a central station including a CPU (21), a memory (23) a delay time detecting circuit (25) and delay time setting circuits (26) for corresponding transmitters connected to the central station. A plurality of receivers are arranged to receive signals from corresponding transmitters. A target number is assigned to each of the transmitters, whereby they can be designated one by one. The memory (23) stores the sequential order of the target numbers to perform the phase adjustment of the transmitters in the sequential order. In the memory (23) the sequential order of the target numbers can be changed by an external terminal (22), so that the sequential order of the transmitters is changed in phase adjustment without changing the target numbers. Phase adjustments are carried out in known manner by comparing detected delay times with reference delay times, the latter preferably being each established by the preceding transmitter in the adjustment sequence.

Inventors

  • 👤 Kenji Nakahara

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-25 12:42
CPC Classifications
H; H04; H04H; H04H20/00; H04H20/65; H04H20/67

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 238 words
A phase adjusting system for a radio communication system comprising, a plurality of transmitters (11, 13, 15, 17), to each of which a target number is assigned for phase adjustment, a plurality of receivers (12, 14, 16), each receiving transmitting signal from a corresponding one of said plural transmitters, delay time setting circuits (26) in each of which the delay time of a corresponding one of the transmitters (11, 13, 15, 17) is set, means (25) for detecting the delay time of a target transmitter selected in accordance with its target number, and means (21) for controlling a corresponding one of the delay time setting circuits (26) and the said means (25) for detecting to calculate the delay time difference between the detected delay time and a reference delay time, and to set a delay time dependent on the delay time difference in the corresponding one of the delay time setting circuits, the target transmitter being thereby adjusted in phase, characterized by a memory (23) for storing the target numbers in sequential order of said target transmitter among said plural transmitters, an input/output terminal (22) for changing the content of memory, and wherein the said sequential order of the target numbers in the memory (23) is changed in accordance with the input of commands from the terminal (22) to the control means (21), whereby the phase adjusting order of the transmitters is changed without changing their target numbers.
Claim 2
Dependent Claim 238 words
A phase adjusting system for a radio communication system comprising, a plurality of transmitters (11, 13, 15, 17), to each of which a target number is assigned for phase adjustment, a plurality of receivers (12, 14, 16), each receiving transmitting signal from a corresponding one of said plural transmitters, delay time setting circuits (26) in each of which the delay time of a corresponding one of the transmitters (11, 13, 15, 17) is set, means (25) for detecting the delay time of a target transmitter selected in accordance with its target number, and means (21) for controlling a corresponding one of the delay time setting circuits (26) and the said means (25) for detecting to calculate the delay time difference between the detected delay time and a reference delay time, and to set a delay time dependent on the delay time difference in the corresponding one of the delay time setting circuits, the target transmitter being thereby adjusted in phase, characterized by a memory (23) for storing the target numbers in sequential order of said target transmitter among said plural transmitters, an input/output terminal (22) for changing the content of memory, and wherein the said sequential order of the target numbers in the memory (23) is changed in accordance with the input of commands from the terminal (22) to the control means (21), whereby the phase adjusting order of the transmitters is changed without changing their target numbers.
Claim 3
Dependent Claim 49 words
A phase adjusting system for a radio communication system according to claim 1, characterized in that a reference transmitter (e.g. No. 1) is selected in correspondence with the target transmitter (e.g. No. 2) from among the plurality of transmitters (11, 13, 15, 17) to provide the reference delay time.
Claim 4
Dependent Claim 30 words
A phase adjusting system for a radio communication system according to claim 2, characterized in that the memory (23) stores the relation of the reference transmitter to the target transmitter.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Maintenance schedule is calculated for granted US utility patents.

Assigned Categories & Tags

No categories assigned to this patent yet.

Assign Category Tag