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We consider space time block coded-continuous phase modulation (STBC-CPM), which has the advantages of both STBC and CPM at the same time. A weak point of STBC-CPM is that the normalized spectral efficiency (*NSE*) is limited by the orthogonality of the STBC and CPM parameters. The purpose of this study is to improve the *NSE* of STBC-CPM. The *NSE* depends on the transmission rate (*TR*), the bit error rate (*BER*) and the occupied bandwidth (*OBW*). First, to improve the *TR*, we adapt quasi orthogonal-STBC (QO-STBC) for four transmit antennas and quasi-group orthogonal Toeplitz code (Q-GOTC) for eight transmit antennas, at the expense of the orthogonality. Second, to evaluate the *BER*, we derive a *BER* approximation of STBC-CPM with non-orthogonal STBC (NO-STBC). The theoretical analysis and simulation results show that the *NSE* can be improved by using QO-STBC and Q-GOTC. Third, the *OBW* depends on CPM parameters, therefore, the tradeoff between the *NSE* and the CPM parameters is considered. A computer simulation provides a candidate set of CPM parameters which have better *NSE*. Finally, the adaptation of non-orthogonal STBC to STBC-CPM can be viewed as a generalization of the study by Silvester et al., because orthogonal STBC can be thought of as a special case of non-orthogonal STBC. Also, the adaptation of Q-GOTC to CPM can be viewed as a generalization of our previous letter, because linear modulation scheme can be thought of as a special case of non-linear modulation.

- Publication
- IEICE TRANSACTIONS on Communications Vol.E101-B No.9 pp.2024-2032

- Publication Date
- 2018/09/01

- Publicized
- 2018/03/14

- Online ISSN
- 1745-1345

- DOI
- 10.1587/transcom.2018EBP3018

- Type of Manuscript
- PAPER

- Category
- Wireless Communication Technologies

Kazuyuki MORIOKA

Electronic Navigation Research Institute, National Institute of Maritime, Port and Aviation Technology

Satoshi YAMAZAKI

Numazu College

David ASANO

Shinshu University

The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.

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Kazuyuki MORIOKA, Satoshi YAMAZAKI, David ASANO, "Improving Spectral Efficiency of Non-Orthogonal Space Time Block Coded-Continuous Phase Modulation" in IEICE TRANSACTIONS on Communications,
vol. E101-B, no. 9, pp. 2024-2032, September 2018, doi: 10.1587/transcom.2018EBP3018.

Abstract: We consider space time block coded-continuous phase modulation (STBC-CPM), which has the advantages of both STBC and CPM at the same time. A weak point of STBC-CPM is that the normalized spectral efficiency (*NSE*) is limited by the orthogonality of the STBC and CPM parameters. The purpose of this study is to improve the *NSE* of STBC-CPM. The *NSE* depends on the transmission rate (*TR*), the bit error rate (*BER*) and the occupied bandwidth (*OBW*). First, to improve the *TR*, we adapt quasi orthogonal-STBC (QO-STBC) for four transmit antennas and quasi-group orthogonal Toeplitz code (Q-GOTC) for eight transmit antennas, at the expense of the orthogonality. Second, to evaluate the *BER*, we derive a *BER* approximation of STBC-CPM with non-orthogonal STBC (NO-STBC). The theoretical analysis and simulation results show that the *NSE* can be improved by using QO-STBC and Q-GOTC. Third, the *OBW* depends on CPM parameters, therefore, the tradeoff between the *NSE* and the CPM parameters is considered. A computer simulation provides a candidate set of CPM parameters which have better *NSE*. Finally, the adaptation of non-orthogonal STBC to STBC-CPM can be viewed as a generalization of the study by Silvester et al., because orthogonal STBC can be thought of as a special case of non-orthogonal STBC. Also, the adaptation of Q-GOTC to CPM can be viewed as a generalization of our previous letter, because linear modulation scheme can be thought of as a special case of non-linear modulation.

URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2018EBP3018/_p

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@ARTICLE{e101-b_9_2024,

author={Kazuyuki MORIOKA, Satoshi YAMAZAKI, David ASANO, },

journal={IEICE TRANSACTIONS on Communications},

title={Improving Spectral Efficiency of Non-Orthogonal Space Time Block Coded-Continuous Phase Modulation},

year={2018},

volume={E101-B},

number={9},

pages={2024-2032},

abstract={We consider space time block coded-continuous phase modulation (STBC-CPM), which has the advantages of both STBC and CPM at the same time. A weak point of STBC-CPM is that the normalized spectral efficiency (*NSE*) is limited by the orthogonality of the STBC and CPM parameters. The purpose of this study is to improve the *NSE* of STBC-CPM. The *NSE* depends on the transmission rate (*TR*), the bit error rate (*BER*) and the occupied bandwidth (*OBW*). First, to improve the *TR*, we adapt quasi orthogonal-STBC (QO-STBC) for four transmit antennas and quasi-group orthogonal Toeplitz code (Q-GOTC) for eight transmit antennas, at the expense of the orthogonality. Second, to evaluate the *BER*, we derive a *BER* approximation of STBC-CPM with non-orthogonal STBC (NO-STBC). The theoretical analysis and simulation results show that the *NSE* can be improved by using QO-STBC and Q-GOTC. Third, the *OBW* depends on CPM parameters, therefore, the tradeoff between the *NSE* and the CPM parameters is considered. A computer simulation provides a candidate set of CPM parameters which have better *NSE*. Finally, the adaptation of non-orthogonal STBC to STBC-CPM can be viewed as a generalization of the study by Silvester et al., because orthogonal STBC can be thought of as a special case of non-orthogonal STBC. Also, the adaptation of Q-GOTC to CPM can be viewed as a generalization of our previous letter, because linear modulation scheme can be thought of as a special case of non-linear modulation.},

keywords={},

doi={10.1587/transcom.2018EBP3018},

ISSN={1745-1345},

month={September},}

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TY - JOUR

TI - Improving Spectral Efficiency of Non-Orthogonal Space Time Block Coded-Continuous Phase Modulation

T2 - IEICE TRANSACTIONS on Communications

SP - 2024

EP - 2032

AU - Kazuyuki MORIOKA

AU - Satoshi YAMAZAKI

AU - David ASANO

PY - 2018

DO - 10.1587/transcom.2018EBP3018

JO - IEICE TRANSACTIONS on Communications

SN - 1745-1345

VL - E101-B

IS - 9

JA - IEICE TRANSACTIONS on Communications

Y1 - September 2018

AB - We consider space time block coded-continuous phase modulation (STBC-CPM), which has the advantages of both STBC and CPM at the same time. A weak point of STBC-CPM is that the normalized spectral efficiency (*NSE*) is limited by the orthogonality of the STBC and CPM parameters. The purpose of this study is to improve the *NSE* of STBC-CPM. The *NSE* depends on the transmission rate (*TR*), the bit error rate (*BER*) and the occupied bandwidth (*OBW*). First, to improve the *TR*, we adapt quasi orthogonal-STBC (QO-STBC) for four transmit antennas and quasi-group orthogonal Toeplitz code (Q-GOTC) for eight transmit antennas, at the expense of the orthogonality. Second, to evaluate the *BER*, we derive a *BER* approximation of STBC-CPM with non-orthogonal STBC (NO-STBC). The theoretical analysis and simulation results show that the *NSE* can be improved by using QO-STBC and Q-GOTC. Third, the *OBW* depends on CPM parameters, therefore, the tradeoff between the *NSE* and the CPM parameters is considered. A computer simulation provides a candidate set of CPM parameters which have better *NSE*. Finally, the adaptation of non-orthogonal STBC to STBC-CPM can be viewed as a generalization of the study by Silvester et al., because orthogonal STBC can be thought of as a special case of non-orthogonal STBC. Also, the adaptation of Q-GOTC to CPM can be viewed as a generalization of our previous letter, because linear modulation scheme can be thought of as a special case of non-linear modulation.

ER -