Multipath processor

• US 6,611,548 B2
• Filed: 10/19/2001
• Issued: 08/26/2003
• Est. Priority Date: 01/04/1995
• Status: Expired due to Fees

• Current Assignee: Intel Corporation
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Lomp, Gary R.
• Primary Examiner(s): Ghayour, Mohammad H.
• Assistant Examiner(s): AL BESHRAWI, TONY
• Application Number:
  US10/027,693
• Publication Number:
  US 20020085624A1
• Time in Patent Office: 676 Days
• Field of Search: 375/148, 375/130, 370/331
• US Class Current: 375/148
• CPC Class Codes: H03G 3/3042 in modulators, frequency-changers, transmitters or power amplifiers transmission power control in bidirectional transmission systems H04W52/04
• CPC Class Codes: H03G 3/3047 for intermittent signals, e.g. burst signals
• CPC Class Codes: H04B 1/69 Spread spectrum techniques
• CPC Class Codes: H04B 1/707 using direct sequence modulation
• CPC Class Codes: H04B 1/709 Correlator structure
• CPC Class Codes: H04B 1/7093 Matched filter type
• CPC Class Codes: H04B 1/7115 Constructive combining of multi-path signals, i.e. RAKE receivers
• CPC Class Codes: H04B 1/712 Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
• CPC Class Codes: H04B 2201/70707 Efficiency-related aspects
• CPC Class Codes: H04J 13/00 Code division multiplex systems for frequency hopping H04B1/713
• CPC Class Codes: H04J 13/0003 Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
• CPC Class Codes: H04J 13/10 Code generation
• CPC Class Codes: H04J 13/16 Code allocation
• CPC Class Codes: H04W 52/04 TPC
• CPC Class Codes: H04W 52/22 taking into account previous information or commands
• CPC Class Codes: H04W 52/221 using past power control commands
• CPC Class Codes: H04W 52/225 Calculation of statistics, e.g. average, variance
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/36 with a discrete range or set of values, e.g. step size, ramping or offsets
• CPC Class Codes: H04W 52/362 Aspects of the step size
• CPC Class Codes: H04W 52/367 : Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 52/52 : using AGC [Automatic Gain Control] circuits or amplifiers
• CPC Class Codes: H04W 52/54 : Signalisation aspects of the TPC commands, e.g. frame structure

Abstract

A multipath processor processes a plurality of groups of spread-spectrum signals. Each group has a plurality of spread-spectrum signals. A first plurality of spread-spectrum signals is despread within a first group to generate a first plurality of despread signals. The first plurality of despread signals are combined as a first combined-despread signal. A second plurality of spread-spectrum signals is despread within a second group to generate a second plurality of despread signals. The second plurality of despread signals are combined as a second combined-despread signal. The first and second combined-despread signal are combined as an output-despread signal.

Claims

1. A multipath processor for processing a plurality of groups of spread-spectrum signals, each group having a plurality of spread-spectrum signals, said multipath processor comprising:

first means for despreading a first plurality of spread-spectrum signals within a first group, to generate a first plurality of despread signals, the first spreading means includes a first plurality of correlators for despreading, respectively, the first plurality of spread-spectrum signals, thereby generating the first plurality of despread signals, each correlator of the first plurality of correlators despreads with a chipping-sequence signal having a time delay different from each time delay of each chipping-sequence signal used with other correlators of the first plurality of correlators;

first means for combining the first plurality of despread signals as a first combined-despread signal;

second means for despreading a second plurality of spread-spectrum signals within a second group, to generate a second plurality of despread signals, the second despreading means includes a second plurality of correlators for despreading, respectively, the second plurality of spread-spectrum signals, thereby generating the second plurality of despread signals, each correlator of the second plurality of correlators despreads with a chipping sequence signal having a time delay different from each time delay of each chipping-sequence signal used with other correlators of the second plurality of correlators, and having the time delay different from each time delay of each chipping-sequence signal used with other correlators of the first plurality of correlators;

second means for combining the second plurality of despread signals, as a second combined-despread signal;

means for combining the first combined-despread signal and the second combined-despread signal, as an output-despread signal;

a first plurality and a second plurality of weighting devices, the first plurality of weighting devices for weighting the first plurality of despread signals, and the second plurality of weighting devices for weighting the second plurality of despread signals; and

a first and second weighting device, the first weighting device for weighting the first combined-despread signal, and the second weighting device for weighting the second combined despread signal.

2. A multipath processor for processing a plurality of groups of spread-spectrum signals, each group having a plurality of spread-spectrum signals, said multipath processor comprising:

a first plurality of correlators for despreading a first plurality of spread-spectrum signals within a first group, to generate a first plurality of despread signals, each correlator of the first plurality of correlators despreads with a chipping-sequence signal having a time delay different from each time delay of each chipping-sequence signal used with other correlators of the first plurality of correlators;

a first adder for combining the first plurality of despread signals as a first combined-despread signal;

a second plurality of correlators for despreading a second plurality of spread-spectrum signals within a second group, to generate a second plurality of despread signals, each correlator of the second plurality of correlators despread with a chipping-sequence, signal used with other correlators of the second plurality of correlators, and having the time delay different from each time delay of each chipping-sequence signal used with other correlators of the first plurality of correlators;

a second adder for combining the second plurality of despread signals, as a second combined-despread signal;

an output combiner for combining the first combined-despread signal and the second combined-despread signal, as an output-despread signal;

a first plurality and a second plurality of weighting devices, the first plurality of weighting devices for weighting the first plurality of despread signals, and the second plurality of weighting devices for weighting the second plurality of despread signals; and

a first and second weighting device, the first weighting device for weighting the first combined-despread signal, and the second weighting device for weighting the second combined despread signal.

3. A multipath processor for processing a plurality of groups of spread-spectrum signals, each group having a plurality of spread-spectrum signals, said multipath processor comprising:

a first plurality of matched filters for despreading a first plurality of spread-spectrum signals within a first group, to generate a first plurality of despread signals, each matched filter of the first plurality of matched filters having an impulse response with a time delay different from each time delay of each impulse response used with other matched filters of the first plurality of matched filters;

a first adder for combining the first plurality of despread signals as a first combined-despread signal;

a second plurality of matched filters for despreading a second plurality of spread-spectrum signals within a second group, to generate a second plurality of despread signals, each matched filter of the second plurality of matched filters having an impulse response with a time delay different from each time delay of each impulse response used with other matched filters of the second plurality of matched filters;

a second adder for combining the second plurality of despread signals, as a second combined-despread signal;

an output combiner for combining the first combined-despread signal and the second combined-despread signal, as an output-despread signal;

a first and a second plurality of weighting devices, the first plurality of weighting devices for weighting the first plurality of despread signals, and the second plurality of weighting devices for weighting the second plurality of despread signals; and

a first and second weighting device, the first weighting device for weighting the first combined-despread signal, and the second weighting device for weighting the second combined-despread-signal.

4. A multipath processor for processing a plurality of groups of spread-spectrum signals, each group having a plurality of spread-spectrum signals, said multipath processor comprising:

first means for despreading a first plurality of spread-spectrum signals within a first group, to generate a first plurality of despread signals, the first despreading means includes a first plurality of matched filters for despeading, respectively, the first plurality of spread-spectrum signals, thereby generating the first plurality of despread signals;

first means for combining the first plurality of despread signals as a first combined-despread signal;

second means for despreading a second plurality of spread-spectrum signals within a second group, to generate a second plurality of despread signals, the second despreading means includes a second plurality of matched filters for despreading, respectively, the second plurality of spread-spectrum signals, thereby generating the second plurality of despread signals;

second means for combining the second plurality of despread signals, as a second combined-despread signal;

means for combining the first combined-despread signal and the second combined-despread signal, as an output-despread signal

a first and second plurality of weighting devices, the first plurality of weighting devices for weighting the first plurality of despread signals, and the second plurality of weighting devices for weighting the second plurality of despread signals; and

a first and second weighting device, the first weighting device for weighting the first combined-despread signal, and the second weighting device for weighting the second combined despread signal.