Apex Standards Claim Construction


Patent: US7917102B2
Filed: 2003-08-07
Issued: 2011-03-29
Patent Holder: (Original Assignee) Panasonic Corp     (Current Assignee) Redwood Technologies LLC
Inventor(s): Kiyotaka Kobayashi, Yutaka Murakami, Masayuki Orihashi

Title: Radio transmitting apparatus and radio transmission method

Abstract: A radio transmitting apparatus that has a plurality of antennas and changes the number of modulated signals transmitted simultaneously according to the propagation environment and so forth. A transmission power changing section 12 of a radio transmitting apparatus of the present invention adjusts the pilot symbol signal level so as to match the data symbol composite signal level according to the number of transmit modulated signals set by a modulated signal number setting section 11 . By this means, the operating range of received pilot symbols and the operating range of received data symbols become approximately the same on the receiving side, enabling pilot symbol quantization error to be reduced. As a result, the precision of radio wave propagation environment estimation, time synchronization, and frequency offset estimation using pilot symbols improves, and consequently data reception quality improves.

The First Claim: 1. A radio transmission method for transmitting a modulated signal, said method comprising: forming a transmission frame which includes a frequency offset estimation signal for estimating frequency offset of the modulated signal at a receiving apparatus, a channel fluctuation estimation signal for estimating channel fluctuation of the modulated signal at the receiving apparatus and a gain control signal for performing gain control of the modulated signal at the receiving apparatus; and transmitting the transmission frame, wherein: the transmission frame includes a first gain control signal and a second gain control signal; the first gain control signal is arranged prior to the frequency offset estimation signal; and the second gain control signal is arranged subsequent to the frequency offset estimation signal and prior to the channel fluctuation estimation signal.


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Reference	Claim Element / Subject Matter	Feature	Meaning	Claim Construction & Interpretation
[1]	1 . A radio transmission method [1]	radio transmission method [1]	[Meaning 1] method [Meaning 2] transmitter [Meaning 3] process [Meaning 4] transmit method [Meaning 5] communication method [Meaning 6] method in an apparatus	[Interpretation 1] transmission method for transmitting an information signal to be transmitted by means of an optical fiber [Interpretation 2] control method for controlling gain of an analog front end circuit of an optical transmission apparatus [Interpretation 3] method of transmitting an information signal by using an information transmission apparatus [Interpretation 4] communication method for transmitting and receiving data using an of the band [Interpretation 5] communication method for performing wireless communication using an rf signal
[2]	for transmitting (broadcasting, transmission, using, carrying, processing) a modulated (modulation, digital, carrier, superimposed, received) signal [2]	signal [2]	[Meaning 1] signals [Meaning 2] wave [Meaning 3] symbol [Meaning 4] digital signal [Meaning 5] transmission signal [Meaning 6] radio signal	[Interpretation 1] symbol signal modulated by using an orthogonal frequency division multiplex scheme and being subjected to frequency offset and channel fluctuation [Interpretation 2] radio signal to be transmitted to at least one receiving apparatus via at least one antenna [Interpretation 3] radio signal to be transmitted to one or more receiving apparatus each [Interpretation 4] symbol signal modulated by using an orthogonal code in the time domain [Interpretation 5] radio signal including at least one of data and voice [Interpretation 6] frame which includes an information signal and an orthogonal code [Interpretation 7] symbol signal modulated by using at least one modulation scheme
[3]	, said method [3]	method [3]	[Meaning 1] step [Meaning 2] transmitting [Meaning 3] transmission [Meaning 4] method further [Meaning 5] method at least [Meaning 6] method comprising the steps	[Interpretation 1] modulated signal being modulated by using an orthogonal frequency division multiplex scheme and being transmitted by using radio waves and [Interpretation 2] radio transmission method being performed by an apparatus for transmitting the modulated signal to be transmitted by radio transmission and [Interpretation 3] method being performed by an apparatus for transmitting the modulated signal to an apparatus for receiving the modulated signal and [Interpretation 4] modulation signal being modulated by an information signal and said transmission method [Interpretation 5] radio transmission method being performed by radio transmission apparatus and characterized by
[4]	comprising (comprises, having, involving, includes, including) : forming (generating, arranging, obtaining, building, composing) a transmission frame [4]	transmission frame [4]	[Meaning 1] frame [Meaning 2] signal [Meaning 3] transmission [Meaning 4] transmitted frame [Meaning 5] frame for transmission [Meaning 6] transmission frame signal	[Interpretation 1] modulation signal by mod mod the modulated signal with an orthogonal code sequence to thereby generate an orthogonal transmission frame [Interpretation 2] modulation signal by mod mod the modulated signal to be transmitted and forming one transmission frame [Interpretation 3] transmission frame including at least one of the modulated signal and at least one control signal [Interpretation 4] signal frame including at least one signal group each of signals of [Interpretation 5] frame for transmission of the modulated signal by arranging the modulated signal [Interpretation 6] data sequence into transmission frames each including an information sequence [Interpretation 7] frame for transmission of the modulated signal into transmission frame
[5]	which includes (carries, combines, stores, incorporates, include) a frequency [5]	frequency [5]	[Meaning 1] phase [Meaning 2] time [Meaning 3] channel [Meaning 4] first frequency [Meaning 5] radio frequency [Meaning 6] carrier frequency	[Interpretation 1] data signal for performing data modulation and demodulation of the modulated signal and includes an frequency [Interpretation 2] pilot signal for performing frequency offset estimation of the modulated signal at transmitting apparatus and frequency [Interpretation 3] modulation signal for performing frequency and amplitude modulation of an input data signal and including frequency [Interpretation 4] modulated signal for performing radio transmission of information data and including frequency [Interpretation 5] preamble signal for synchronizing the transmission frame with the frequency
[6]	offset (deviation, skew, bias, error, shift) estimation signal [6]	estimation signal [6]	[Meaning 1] estimation [Meaning 2] signal [Meaning 3] estimated signal [Meaning 4] detection signal [Meaning 5] estimation signal used [Meaning 6] signal for performing frequency estimation	[Interpretation 1] signal for performing frequency offset estimation at the receiving apparatus [Interpretation 2] information signal for performing frequency offset estimation signal generation processing
[7]	for estimating (determining, detecting, measuring, compensating, performing) frequency [5] offset of the modulated signal [2] at a receiving (reception, received, transmission, transmitting, sending) apparatus [7]	apparatus [7]	[Meaning 1] device [Meaning 2] side [Meaning 3] radio apparatus [Meaning 4] receiving apparatus [Meaning 5] side apparatus [Meaning 6] apparatus thereof	[Interpretation 1] apparatus and an amplitude control signal for performing amplitude control of the modulated signal at the receiving apparatus and also [Interpretation 2] signal for performing frequency offset compensation of the modulated signal received from an external transmission apparatus [Interpretation 3] apparatus and performing frequency offset compensation of the modulated signal based on the estimated frequency offset
[8]	, a channel fluctuation estimation signal [8]	channel fluctuation estimation signal [8]	[Meaning 1] signal [Meaning 2] channel [Meaning 3] signal estimation [Meaning 4] fluctuation estimation [Meaning 5] estimation signal [Meaning 6] channel fluctuation	[Interpretation 1] channel fluctuation estimation signal which is an estimation reference signal
[9]	for estimating channel fluctuation [9]	channel fluctuation [9]	[Meaning 1] variation [Meaning 2] fluctuation [Meaning 3] channel [Meaning 4] fading fluctuation [Meaning 5] frequency fluctuation [Meaning 6] transmission channel fluctuation	[Interpretation 1] frequency fluctuation of the modulated signal and channel fluctuation of transmission path [Interpretation 2] the channel fluctuation of the modulated signal and for performing gain control [Interpretation 3] fluctuation of the modulated signal in response to channel fluctuation
[10]	of the modulated signal [2] at the receiving apparatus [7] and a gain control signal [10]	gain control signal [10]	[Meaning 1] signal [Meaning 2] preamble [Meaning 3] gain [Meaning 4] parameter [Meaning 5] gain signal [Meaning 6] control signal	[Interpretation 1] transmission data signal for performing data transmission between the receiving apparatus and the modulated signal and includes gain control signals [Interpretation 2] channel estimation signal for est estimation channel quality of the modulated signal at the receiving apparatus and gain control signals [Interpretation 3] gain control signal for instruct the receiving apparatus to perform gain control [Interpretation 4] gain control signal for instruct the gain of an amplifier [Interpretation 5] first gain control signal and the second gain control signal
[11]	for performing (controlling, applying, providing, exercising, conducting) gain control [11]	gain control [11]	[Meaning 1] demodulation [Meaning 2] control [Meaning 3] amplification [Meaning 4] equalization [Meaning 5] amplitude control [Meaning 6] level control	[Interpretation 1] ag control on the frequency offset estimation signal to reduce frequency offset [Interpretation 2] control of gain of the modulated signal to compensate the frequency offset [Interpretation 3] control of gain of an amplifier for amplify the power [Interpretation 4] gain control on the modulated signal to control the amplitude [Interpretation 5] an operation of controlling the gain of the received signal
[12]	of the modulated signal [2] at the receiving apparatus [7] ; and transmitting the transmission frame [4] , wherein : the transmission frame [4] includes a first gain control signal [10] and a second gain control signal [10] ; the first gain control signal [10] is arranged (located, added, included, inserted, placed) prior to the frequency [5] offset estimation signal [6] ; and the second gain control signal [10] is arranged subsequent to the frequency [5] offset estimation signal [6] and prior to the channel fluctuation estimation signal [8] .