Radio reception apparatus, signal processing timing control method, and signal processing timing control program
AssigneesSanyo Electric Co., Ltd., Sanyo Telecommunications Co., Ltd.
InventorsMasashi Iwami, Katsutoshi Kawai
Life of this patent
Estimating the term…
Abstract
In a radio reception apparatus, a variable gain of a reception amplifier is adjusted by an AGC control unit for each frame of a received signal for execution of an AGC operation. The AGC control unit determines and indicates to a digital signal processing unit an AGC operation end point of time. The digital signal processing unit executes prescribed signal processing on a digital signal obtained after the end of the AGC operation, in a known signal segment. Therefore, reception errors caused by erroneous amplitude values of digital signals resulting from the AGC operation can be prevented.
Claims24
A radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, comprising:
- amplification means amplifying said received signal with a variable gain;
- signal processing means performing prescribed signal processing on said received signal amplified by said amplification means;
- gain control means controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level;
- and
- determination means determining and indicating to said signal processing means a signal segment length to be excluded from said prescribed signal processing from a head of said received signal so as to avoid an effect of control of said variable gain, wherein
- said signal processing means performs said prescribed signal processing on a signal segment, excluding said indicated signal segment length, from the head of said received signal.
A radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, comprising;
- amplification means amplifying said received signal with a variable gain;
- signal processing means performing prescribed signal processing on said received signal amplified by said amplification means;
- and
- control means controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level, and determining and indicating to said signal processing means a signal segment length from a head of said received signal that is required for the level of said received signal to converge at said prescribed level, wherein
- said signal processing means performs said prescribed signal processing on a signal segment, excluding said indicated signal segment length, from the head of said received signal.
A radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, comprising:
- amplification means amplifying said received signal with a variable gain;
- signal processing means performing prescribed signal processing on said received signal amplified by said amplification means;
- control means controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level, and determining and indicating to said signal processing means passage of a prescribed signal segment length from a head of said received signal that is set within said known signal segment, wherein
- said signal processing mean is responsive to the indication of said passage for performing said prescribed signal processing on a signal segment excluding said prescribed signal segment length from the head of said received signal.
A radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, comprising:
- amplification means amplifying said received signal with a variable gain;
- digital modulation means modulating said received signal amplified by said amplification means into a digital received signal;
- and
- digital signal processing means receiving said digital received signal, wherein
- said digital signal processing means
- controls said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level,
- determines a signal segment length to be excluded from prescribed signal processing from a head of said received signal so as to avoid an effect of control of said variable gain, and
- performs said prescribed signal processing on a signal segment, excluding said determined signal segment length, from the head of said received signal.
A radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, comprising:
- amplification means amplifying said received signal with a variable gain;
- digital modulation means modulating said received signal amplified by said amplification means into a digital received signal;
- and
- digital signal processing means receiving said digital received signal, wherein
- said digital signal processing means
- controls said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level,
- determines a signal segment length from a head of said received signal that is required for the level of said received signal to converge at said prescribed level, and
- performs prescribed signal processing on a signal segment, excluding said determined signal segment length, from the head of said received signal.
A radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, comprising:
- amplification means amplifying said received signal with a variable gain;
- digital modulation means modulating said received signal amplified by said amplification means into a digital received signal;
- and
- digital signal processing means receiving said digital received signal, wherein
- said digital signal processing means
- controls said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level,
- determines passage of a prescribed signal segment length from a head of said received signal that is set within said known signal segment, and
- in response to said determination, performs prescribed signal processing on a signal segment excluding said prescribed signal segment length from the head of said received signal.
A signal processing timing control method in a radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, said radio reception apparatus including amplification means amplifying said received signal with a variable gain,
- said signal processing timing control method comprising the steps of:
- controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level;
- determining a signal segment length to be excluded from prescribed signal processing from a head of said received signal so as to avoid an effect of control of said variable gain;
- and
- performing said prescribed signal processing on a signal segment, excluding said determined signal segment length, from the head of said received signal.
A signal processing timing control method in a radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, said radio reception apparatus including amplification means amplifying said received signal with a variable gain,
- said signal processing timing control method comprising the steps of:
- controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level;
- determining a signal segment length from a head of said received signal that is required for the level of said received signal to converge at said prescribed level;
- and
- performing prescribed signal processing on a signal segment, excluding said determined signal segment length, from the head of said received signal.
A signal processing timing control method in a radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, said radio reception apparatus including amplification means amplifying said received signal with a variable gain,
- said signal processing timing control method comprising the steps of:
- controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level;
- determining passage of a prescribed signal segment length from a head of said received signal that is set within said known signal segment;
- and
- in response to said determination, performing prescribed signal processing on a signal segment excluding said prescribed signal segment length from the head of said received signal.
A signal processing timing control program in a radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, said radio reception apparatus including amplification means amplifying said received signal with a variable gain,
- said signal processing timing control program causing a computer to execute the steps of:
- controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level;
- determining a signal segment length to be excluded from prescribed signal processing from a head of said received signal so as to avoid an effect of control of said variable gain;
- and
- performing said prescribed signal processing on a signal segment, excluding said determined signal segment length, from the head of said received signal.
A signal processing timing control program in a radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, said radio reception apparatus including amplification means amplifying said received signal with a variable gain,
- said signal processing timing control program causing a computer to execute the steps of:
- controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level;
- determining a signal segment length from a head of said received signal that is required for the level of said received signal to converge at said prescribed level;
- and
- performing prescribed signal processing on a signal segment, excluding said determined signal segment length, from the head of said received signal.
A signal processing timing control program in a radio reception apparatus processing a received signal formed of a signal series having a known signal segment at a head portion, said radio reception apparatus including amplification means amplifying said received signal with a variable gain,
- said signal processing timing control program causing a computer to execute the steps of:
- controlling said variable gain of said amplification means such that a level of said received signal amplified by said amplification means converges at a prescribed level;
- determining passage of a prescribed signal segment length from a head of said received signal that is set within said known signal segment;
- and
- in response to said determination, performing prescribed signal processing on a signal segment excluding said prescribed signal segment length from the head of said received signal.
Dependencies are inferred from the claim text.