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US 10,098,102 B2Granted
Enhanced physical downlink control channel scrambling and demodulation reference signal sequence generation
AssigneeIntel Corporation
InventorsSeunghee Han, Yuan Zhu, Xiaogang Chen, Yi Qin, Jong-Kae Fwu
Life of this patent
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Abstract
Methods, apparatuses, and systems are described to provide enhanced physical downlink control channel scrambling and demodulation reference signal sequence generation.
Claims18
An apparatus to be employed in a user equipment (UE), the apparatus comprising:
- channel estimation circuitry to
- receive a reference signal sequence for a first antenna port on an orthogonal frequency division multiplexing (OFDM) symbol, and
- estimate a channel for the first antenna port for the UE based on the received reference signal sequence and an assumption that the reference signal sequence is transmitted to another UE for a second antenna port;
- channel compensation circuitry coupled with the channel estimation circuitry to receive an estimate of the channel and compensate a received signal;
- and
- decoding circuitry to perform a blind decoding operation for enhanced physical downlink control channel (EPDCCH) based on the assumption and a scrambling initialization seed cint given by
- cint=└ns/2┘*29+NIDePDCCH,
- where ns is a slot number within a radio frame and NIDePDCCH is a virtual cell identifier that corresponds to an EPDCCH set in which downlink control information (DCI) is transmitted.
5 more elements
One or more non-transitory, computer-readable media having instructions that, when executed, cause a user equipment (UE) to:
- receive a reference signal sequence for a first antenna port on an orthogonal frequency division multiplexing (OFDM) symbol;
- estimate a channel for the first antenna port for the UE based on the received reference signal sequence and an assumption that the reference signal sequence is transmitted to another UE for a second antenna port;
- receive an estimate of the channel and compensate a received signal;
- and
- blindly decode an enhanced physical downlink control channel (EPDCCH) based on the assumption and a scrambling initialization seed cint given by
- cint=└ns/2┘*29+NIDePDCCH,
- where ns is a slot number within a radio frame and NIDePDCCH is a virtual cell identifier that corresponds to an EPDCCH set in which downlink control information (DCI) is transmitted.
4 more elements
One or more non-transitory, computer-readable media having instructions that, when executed, cause a user equipment (UE) to:
- determine a reference signal sequence received for a first antenna port for communications between the UE and an enhanced node B is also used for communications of a second antenna port;
- and
- perform a blind decoding operation for enhanced physical downlink control channel (EPDCCH) based on said determination and a scrambling initialization seed cint given
- cint=└ns/2┘*29+NIDePDCCH,
- where ns is a slot number within a radio frame and NIDePDCCH is a virtual cell identifier that corresponds to an enhanced physical downlink control channel (EPDCCH) set in which downlink control information (DCI) is transmitted.
2 more elements
An apparatus to be employed in a user equipment (UE), the apparatus comprising circuitry to:
- receive a reference signal sequence for a first antenna port on an orthogonal frequency division multiplexing (OFDM) symbol,
- estimate a channel for the first antenna port for the UE based on the received reference signal sequence and determination that the reference signal sequence is transmitted to another UE for a second antenna port;
- and
- perform a blind decoding operation based on the determination and a scrambling initialization seed cint given by
- cint=└ns/2┘*29+NIDePDCCH,
- where ns is a slot number within a radio frame and NIDePDCCH is a virtual cell identifier that corresponds to an enhanced physical downlink control channel (EPDCCH) set in which downlink control information (DCI) is transmitted.
3 more elements
Dependencies are inferred from the claim text.