Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
141 words
A CDMA (Code Division Multiple Access) receiving
apparatus for demodulating data multi-code-transmitted
through a plurality of channels, said apparatus
comprising in at least one part of systems for demodulating
reception signals of the respective channels: first spread code generating means (151, 153,
155, 157) for generating spread codes allocated to the
channels for demodulation; second spread code generating means (152, 154,
156, 158) for generating spread codes in which a pilot
signal is spread; and despreading means (131, 132, 133, 134) for
despreading the reception signal on the basis of the
spread codes generated by said first and second spread
code generating means, whereby channel condition is
estimated on the basis of the pilot signal extracted by
despreading so that the reception signals of the respective
channels are subjected to coherent detection on the
basis of a result of the estimation.
Claim 2
Dependent Claim
37 words
A CDMA receiving apparatus according to Claim
1, wherein: said pilot signal is spread on the basis of
one spread code; and said second spread code generating means (152,
154, 156, 158) generates said one spread code.
Claim 3
Dependent Claim
63 words
A CDMA receiving apparatus according to Claim
1 or 2, wherein: each of said systems includes said despreading
means, and selection means (141, 142, 143, 144) for
selecting said spread codes generated by said first and
second spread code generating means (151, 153, 155, 157,
152, 154, 156, 158) and supplying the selected spread
code to said despreading means (131, 132, 133, 134).
Claim 4
Dependent Claim
77 words
A CDMA receiving apparatus according to Claim
3, wherein: said selection means (141, 142, 143, 144) supplies
the spread code generated in each pilot signal
reception period by said second spread code generating
means (152, 154, 156, 158) to said despreading means
(131, 132, 133, 134) and supplies the spread code generated
in each information data reception region by said
first spread code generating means (151, 153, 155, 157)
to said despreading means (131, 132, 133, 134).
Claim 5
Dependent Claim
52 words
A CDMA receiving apparatus according to Claim
1, wherein: said pilot signal is spread while being shifted
in time on the basis of spread codes allocated to the
respective channels so that said second spread code
generating means (152, 154, 156, 158) successively generate
the spread codes allocated to the respective channels.
Claim 6
Dependent Claim
128 words
A CDMA receiving apparatus according to Claim
5, wherein: each of said systems includes a first
despreading means (631, 633, 653) for despreading the
reception signal on the basis of the spread code generated
by said first spread code generating means (651, 653,
655), and a second despreading means (632, 634, 636) for
despreading the reception signal on the basis of the
spread code generated by said second spread code generating
means (652, 654, 656); and the transmission condition of line is estimated
on the basis of the pilot signal extracted by
despreading in said second despreading means (632, 634,
636) so that the signal despread by said first
despreading means (631, 633, 653) is subjected to coherent
detection on the basis of a result of the estimation.