The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Kertas kerja ini menjelaskan melalui eksperimen peningkatan prestasi kadar ralat bit (BER) yang boleh dicapai apabila kepelbagaian penghantaran masa ruang (STTD) digunakan pada pautan ke hadapan pembahagian kod jujukan langsung jalur lebar (W-CDMA). Pertama, keputusan eksperimen makmal menjelaskan bahawa perbezaan masa laluan yang diterima bagi isyarat yang dihantar daripada dua antena, disebabkan kelewatan perambatan, hendaklah dalam tempoh cip kira-kira 1/4 dan 1/2 dengan dan tanpa kawalan kuasa penghantaran cepat (TPC) , masing-masing, untuk mencapai kesan kepelbagaian penghantaran yang menonjol. Kami menunjukkan bahawa purata yang diperlukan menerima tenaga isyarat setiap ketumpatan spektrum hingar bit ke latar belakang (Eb/N0) pada purata BER 10-3 menggunakan STTD dikurangkan kira-kira 4.2 (1.7) dB berbanding kes penghantaran antena tunggal pada frekuensi Doppler maksimum, fD, 5 Hz tanpa (dengan) penerimaan kepelbagaian antena di stesen mudah alih (MS) disebabkan peningkatan kesan rawak ralat pecah. Tambahan pula, kami menjelaskan bahawa walaupun keuntungan STTD dalam eksperimen lapangan berkurangan berbanding dengan eksperimen makmal, kerana kemerosotan dalam ketepatan carian laluan adalah lebih besar disebabkan oleh masa tunda yang kerap berubah bagi setiap laluan dalam saluran pudar berbilang laluan sebenar, purata yang diperlukan tenaga isyarat yang diterima setiap bit-ke-gangguan ditambah nisbah ketumpatan spektrum kuasa hingar latar belakang (Eb/I0) pada purata BER 10-3 dengan STTD berkurangan kira-kira 1.3 hingga 1.5 (0.7 hingga 1.0) dB tanpa (dengan) penerimaan kepelbagaian antena apabila TPC pantas tidak digunakan dalam pautan hadapan. Ini menunjukkan bahawa STTD berkesan untuk saluran tanpa TPC seperti saluran kawalan biasa dalam saluran pudar berbilang laluan sebenar.
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Salinan
Satoru FUKUMOTO, Kenichi HIGUCHI, Mamoru SAWAHASHI, Fumiyuki ADACHI, "Experiments on Space Time Block Coding Transmit Diversity (STTD) in W-CDMA Forward Link" in IEICE TRANSACTIONS on Fundamentals,
vol. E84-A, no. 12, pp. 3045-3057, December 2001, doi: .
Abstract: This paper elucidates through experiments the improvement in the achievable bit error rate (BER) performance when space time transmit diversity (STTD) is applied to the wideband direct sequence code division multiple access (W-CDMA) forward link. First, laboratory experimental results clarify that the received path timing difference of transmitted signals from two antennas, due to the propagation delay, should be within a chip duration of approximately 1/4 and 1/2 with and without fast transmit power control (TPC), respectively, in order to achieve a prominent transmit diversity effect. We show that the required average received signal energy per bit-to-background noise spectrum density (Eb/N0) at the average BER of 10-3 using STTD is decreased by approximately 4.2 (1.7) dB compared to the case of single-antenna transmission at the maximum Doppler frequency, fD, of 5 Hz without (with) antenna diversity reception at a mobile station (MS) due to the increasing randomization effect of burst error. Furthermore, we elucidate that although the gain of STTD in field experiments is decreased compared to that in laboratory experiments, since the degradation in path search accuracy is greater due to the frequently changing delay time of each path in a real multipath-fading channel, the required average received signal energy per bit-to-interference plus background noise power spectrum density ratio (Eb/I0) at the average BER of 10-3 with STTD is decreased by approximately 1.3 to 1.5 (0.7 to 1.0) dB without (with) antenna diversity reception when fast TPC is not applied in the forward link. This indicates that STTD is effective for a channel without TPC such as a common control channel in a real multipath-fading channel.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e84-a_12_3045/_p
Salinan
@ARTICLE{e84-a_12_3045,
author={Satoru FUKUMOTO, Kenichi HIGUCHI, Mamoru SAWAHASHI, Fumiyuki ADACHI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Experiments on Space Time Block Coding Transmit Diversity (STTD) in W-CDMA Forward Link},
year={2001},
volume={E84-A},
number={12},
pages={3045-3057},
abstract={This paper elucidates through experiments the improvement in the achievable bit error rate (BER) performance when space time transmit diversity (STTD) is applied to the wideband direct sequence code division multiple access (W-CDMA) forward link. First, laboratory experimental results clarify that the received path timing difference of transmitted signals from two antennas, due to the propagation delay, should be within a chip duration of approximately 1/4 and 1/2 with and without fast transmit power control (TPC), respectively, in order to achieve a prominent transmit diversity effect. We show that the required average received signal energy per bit-to-background noise spectrum density (Eb/N0) at the average BER of 10-3 using STTD is decreased by approximately 4.2 (1.7) dB compared to the case of single-antenna transmission at the maximum Doppler frequency, fD, of 5 Hz without (with) antenna diversity reception at a mobile station (MS) due to the increasing randomization effect of burst error. Furthermore, we elucidate that although the gain of STTD in field experiments is decreased compared to that in laboratory experiments, since the degradation in path search accuracy is greater due to the frequently changing delay time of each path in a real multipath-fading channel, the required average received signal energy per bit-to-interference plus background noise power spectrum density ratio (Eb/I0) at the average BER of 10-3 with STTD is decreased by approximately 1.3 to 1.5 (0.7 to 1.0) dB without (with) antenna diversity reception when fast TPC is not applied in the forward link. This indicates that STTD is effective for a channel without TPC such as a common control channel in a real multipath-fading channel.},
keywords={},
doi={},
ISSN={},
month={December},}
Salinan
TY - JOUR
TI - Experiments on Space Time Block Coding Transmit Diversity (STTD) in W-CDMA Forward Link
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 3045
EP - 3057
AU - Satoru FUKUMOTO
AU - Kenichi HIGUCHI
AU - Mamoru SAWAHASHI
AU - Fumiyuki ADACHI
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E84-A
IS - 12
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - December 2001
AB - This paper elucidates through experiments the improvement in the achievable bit error rate (BER) performance when space time transmit diversity (STTD) is applied to the wideband direct sequence code division multiple access (W-CDMA) forward link. First, laboratory experimental results clarify that the received path timing difference of transmitted signals from two antennas, due to the propagation delay, should be within a chip duration of approximately 1/4 and 1/2 with and without fast transmit power control (TPC), respectively, in order to achieve a prominent transmit diversity effect. We show that the required average received signal energy per bit-to-background noise spectrum density (Eb/N0) at the average BER of 10-3 using STTD is decreased by approximately 4.2 (1.7) dB compared to the case of single-antenna transmission at the maximum Doppler frequency, fD, of 5 Hz without (with) antenna diversity reception at a mobile station (MS) due to the increasing randomization effect of burst error. Furthermore, we elucidate that although the gain of STTD in field experiments is decreased compared to that in laboratory experiments, since the degradation in path search accuracy is greater due to the frequently changing delay time of each path in a real multipath-fading channel, the required average received signal energy per bit-to-interference plus background noise power spectrum density ratio (Eb/I0) at the average BER of 10-3 with STTD is decreased by approximately 1.3 to 1.5 (0.7 to 1.0) dB without (with) antenna diversity reception when fast TPC is not applied in the forward link. This indicates that STTD is effective for a channel without TPC such as a common control channel in a real multipath-fading channel.
ER -