Measurement method and apparatus
View Patent ↗The disclosure discloses a measurement method. The method includes: a conjugate multiplication operation is performed on reference signals corresponding to a subcarrier within adjacent time slots to remove phase interference of the reference signals; the reference signals from which the phase interference has been removed are descrambled; and all the descrambled reference signals are accumulated. The disclosure further provides a measurement apparatus. With the technical solution of the disclosure, the operation complexity of measurement can be reduced.
1. A measurement method in a receiver, comprising:
performing, by a remover, a conjugate multiplication operation on reference signals received at the receiver from a base station corresponding to a subcarrier within adjacent time slots to remove phase interference of the reference signals;
descrambling, by a descrambler, the reference signals from which the phase interference has been removed; and
accumulating, by an accumulator, all the descrambled reference signals;
wherein the descrambling the reference signals from which the phase interference has been removed comprises:
constructing, by the descrambler, a descramblinq sequence RS(k)=RS* t,l (k)·RS t+1,l (k), where RS* t,l (k) and RS t+1,l (k) represent a conjugate signal of a reference signal sent on a k-th subcarrier in an l-th symbol within time slot t and a reference signal sent on the k-th subcarrier in the l-th symbol within time slot t+l by the base station respectively; and
multiplying a reference signal R(k) from which the phase interference has been removed by the descrambling sequence RS(k) to obtain {circumflex over (R)}(k)=RS(k)·R(k).
2. The method according to claim 1 , where the performing a conjugate multiplication operation on reference signals corresponding to a subcarrier within adjacent time slots to remove phase interference of the reference signals comprises:
selecting a reference signal from received signals within one of the adjacent time slots, and performing the conjugate multiplication operation on a reference signal corresponding to the subcarrier within the other of the adjacent time slots and the selected reference signal to obtain R(k)=R* t+1,l (k)·R t,l (k), where R t,l (k) represents a reference signal received on a k-th subcarrier in an l-th Orthogonal Frequency Division Multiplexing (OFDM) symbol within time slot t and R* t+1,l (k) represents a conjugate signal of a reference signal received on the k-th subcarrier in the l-th OFDM symbol within time slot t+1.
3. The method according to claim 1 , wherein the accumulating all the descrambled reference signals comprises:
accumulating all the descrambled reference signals within a measurement bandwidth to obtain
R
_
(
k
)
=
∑
K
R
(
k
)
,
where K represents a number of all the descrambled reference signals within the measurement bandwidth in an OFDM symbol.
4. A measurement apparatus in a receiver, comprising:
a remover, a descrambler and an accumulator, wherein
the remover is configured to perform a conjugate multiplication operation on reference signals received at the receiver from a base station corresponding to a subcarrier within adjacent time slots to remove phase interference of the reference signals;
the descrambler is configured to descramble the reference signals from which the phase interference has been removed; and
the accumulator is configured to accumulate all the descrambled reference signals;
wherein the descrambler is further configured to construct a descrambling sequence RS(k)=RS* t,l (k)·RS t+1,l (k), where RS* t,l (k) and RS t+1,l (k) represent a conjugate signal of a reference signal sent on a k-th subcarrier in an l-th symbol within time slot t and a reference signal sent on the k-th subcarrier in the l-th symbol within time slot t+1 by the base station respectively; and
multiply a reference signal R(k) from which the phase interference has been removed by the descrambling sequence RS(k) to obtain {circumflex over (R)}(k)=RS(k)·R(k).
5. The apparatus according to claim 4 , wherein the remover is configured to:
select a reference signal from received signals within one of the adjacent time slots, and perform the conjugate multiplication operation on a reference signal corresponding to the subcarrier within the other of the adjacent time slots and the selected reference signal to obtain R(k)=R* t+1,l (k)·R t,l (k), where R t,l (k) represents a reference signal received on a k-th subcarrier in an l-th Orthogonal Frequency Division Multiplexing (OFDM) symbol within time slot t and R* t+1,l (k) represents a conjugate signal of a reference signal received on the k-th subcarrier in the l-th OFDM symbol within time slot t+1.
6. The apparatus according to claim 4 , wherein the accumulator module is configured to:
accumulate all the descrambled reference signals within a measurement bandwidth to obtain
R
_
(
k
)
=
∑
K
R
(
k
)
,
where K represents a number of all the descrambled reference signals within the measurement bandwidth in an OFDM symbol.