MC-CDMA MULTIPLEXING IN AN ORTHOGONAL UPLINK
First Claim
1. A method for providing wireless transmissions from a user device over a plurality of sub-carriers, comprising:
- utilizing, at the user device, an assigned non-overlapping group of sub-carriers over which the user device is to transmit; and
providing transmissions from the user device by frequency hopping over time within the one non-overlapping group of sub-carriers over which the user device transmits;
wherein said providing transmissions comprises providing pilot symbols from the user device over time within the one non-overlapping group over which the user device transmits for use in channel estimation.
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Accused Products
Abstract
Techniques are provided to support multi-carrier code division multiple access (MC-CDMA) in an orthogonal uplink of a wireless communication system. A method of wireless multi-carrier communications comprises dividing sub-carriers on an uplink into non-overlapping groups, allocating a time-frequency block including a hopping duration and a non-overlapped group, respectively, assigning a different set of orthogonal codes to each user, spreading data (or pilot) symbols of each user over the allocated time-frequency block, wherein the data (or pilot) symbols of each user are spread using the different set of orthogonal codes assigned to each user, mapping each data (or pilot) symbol to a modulation symbol in the time-frequency block, generating an orthogonal waveform based on the mapped symbols, and transmitting the orthogonal waveform.
118 Citations
32 Claims
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1. A method for providing wireless transmissions from a user device over a plurality of sub-carriers, comprising:
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utilizing, at the user device, an assigned non-overlapping group of sub-carriers over which the user device is to transmit; and providing transmissions from the user device by frequency hopping over time within the one non-overlapping group of sub-carriers over which the user device transmits; wherein said providing transmissions comprises providing pilot symbols from the user device over time within the one non-overlapping group over which the user device transmits for use in channel estimation. - View Dependent Claims (2, 3)
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4. A user device configured to provide wireless transmissions over a plurality of sub-carriers, comprising:
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a controller configured to utilize an assigned non-overlapping group of sub-carriers over which the user device is to transmit; and a transmitter configured to provide transmissions by frequency hopping over time within the one non-overlapping group of sub-carriers over which the user device transmits received from the controller; wherein said transmitter provides pilot symbols over time within the one non-overlapping group over which the user device transmits for use in channel estimation. - View Dependent Claims (5, 6)
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7. A user device configured to provide wireless transmissions over a plurality of sub-carriers, comprising:
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means for utilizing, at the user device, an assigned non-overlapping group of sub-carriers over which the user device is to transmit; and means for providing transmissions from the user device by frequency hopping over time within the one non-overlapping group of sub-carriers over which the user device transmits; wherein said means for providing transmissions comprise means for providing pilot symbols from the user device over time within the one non-overlapping group over which the user device transmits for use in channel estimation. - View Dependent Claims (8, 9)
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10. A memory unit comprising software configured to execute a method for providing wireless transmissions from a user device over a plurality of sub-carriers, the method comprising:
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utilizing, at the user device, an assigned non-overlapping group of sub-carriers over which the user device is to transmit; and providing transmissions from the user device by frequency hopping over time within the one non-overlapping group of sub-carriers over which the user device transmits; wherein said providing transmissions comprise providing pilot symbols from the user device over time within the one non-overlapping group over which the user device transmits for use in channel estimation. - View Dependent Claims (11, 12)
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13. A user device configured to provide wireless transmissions over a plurality of sub-carriers, comprising:
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a controller configured to utilize an assigned non-overlapping group of sub-carriers over which the user device is to transmit, said non-overlapping group not overlapping with groups utilized by other user devices in a region wherein the user device transmits; a modulator configured to process data symbols for frequency hopping and transmission over the assigned non-overlapping group of sub-carriers; and a transmit processor configured to receive modulated symbols from the modulator and provide N transmit symbols for N sub-carriers; and a transmitter configured to transmit the N transmit symbols over the N sub-carriers using frequency hopping. - View Dependent Claims (14, 15, 16, 17)
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18. A method for providing, from a user device, wireless transmissions over a plurality of sub-carriers, comprising:
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utilizing an assigned non-overlapping group of sub-carriers over which the user device is to transmit, said non-overlapping group not overlapping with groups utilized by other user devices in a region wherein the user device transmits; processing data symbols for frequency hopping and transmission over the assigned non-overlapping group of sub-carriers; and receiving modulated symbols and providing N transmit symbols for N sub-carriers; and transmitting the N transmit symbols over the N sub-carriers using frequency hopping. - View Dependent Claims (19, 20, 21, 22)
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23. A user device configured to provide wireless transmissions over a plurality of sub-carriers, comprising:
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means for utilizing an assigned non-overlapping group of sub-carriers over which the user device is to transmit, said non-overlapping group not overlapping with groups utilized by other user devices in a region wherein the user device transmits; means for processing data symbols for frequency hopping and transmission over the assigned non-overlapping group of sub-carriers; and means for receiving modulated symbols and providing N transmit symbols for N sub-carriers; and means for transmitting the N transmit symbols over the N sub-carriers using frequency hopping. - View Dependent Claims (24, 25, 26, 27)
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28. A memory unit comprising software configured to execute a method for providing, from a user device, wireless transmissions over a plurality of sub-carriers, the method comprising:
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utilizing an assigned non-overlapping group of sub-carriers over which the user device is to transmit, said non-overlapping group not overlapping with groups utilized by other user devices in a region wherein the user device transmits; processing data symbols for frequency hopping and transmission over the assigned non-overlapping group of sub-carriers; and receiving modulated symbols and providing N transmit symbols for N sub-carriers; and transmitting the N transmit symbols over the N sub-carriers using frequency hopping. - View Dependent Claims (29, 30, 31, 32)
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Specification